Malicious PDF — malware analysis report

Static analysis result for SHA-256 e127dfbf6fabcc20…

MALICIOUS

PDF

101.0 KB Created: 2021-09-03 22:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f19115da7e90c4d7a09423990a9bc85f SHA-1: 2c16201083bd08d60fba9f302c2f755461ff2ff5 SHA-256: e127dfbf6fabcc20126634c1d961b72f3327d85471cd54814927fdfcbe76a224
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content or download further payloads. The presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ab597e30a6---kukefezuwozugavejopik.pdf PDF link annotation
    • http://www.contectrade.hu/fckfiles/file/vegimerepide.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/11417243641.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d960aa2f49---gapegogeketabavoba.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/0hulcscl4aifdanu6t0bs9qgn7/lediximetusapipixakezef.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160fb7dcdc64be---xoremepijo.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/iuopi7pfbc68f4ervmvktaenj1/xekasukokezunovenutewap.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/463558061a49db712b8e2ec0182754f3/zetezobol.pdfIn PDF document text
    • https://nguyenhungstone.com/uploads/image/files/gofape.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e517b840939---mavireladezop.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/4ac173de82ae76673c5120b8dabbf3e8/26006629061.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/bejesuresetomekapevo.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/d2ca56fe26a249c812042bee6b5d53a2/98646568806.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/27048546584.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/407c9c61166b3681c29bdc2c61b4cef4/ratozufefanagipewuf.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee1a5d98997---99346121332.pdfIn PDF document text
    • https://atlas-consulting.ro/fckeditor/fisiere/file/xoginowosilanokefuvowe.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160da5abb9abc4---lufusofatedagufavuza.pdfIn PDF document text
    • http://vanprodukt.cz/UserFiles/File/fipilodutugebivu.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/fubibolom.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021060813033973499.pdfIn PDF document text
    • http://sterenstein.ru/userfiles/file/97326871990.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210829162532.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=diagnostico+de+neuralgia+del+trigemino+pdfPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/90825931538.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12646 11064 bytes
SHA-256: ca032876a3f9581633248b81332e44a7a7fc26d1dd3604c19abe89a112df9110
font_01_sfnt_off00013fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD8 17688 bytes
SHA-256: 76a83598f3dcfa8df5d05f3df7d231d05a3a561183ca947bc850b79d67a2f9c2
font_02_sfnt_off00016df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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