Malicious PDF — malware analysis report

Static analysis result for SHA-256 f08c26698074f15b…

MALICIOUS

PDF

72.2 KB Created: 2021-09-19 11:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6c3ff62c81ef02307357934f830bdd6e SHA-1: 1af969496d1347ea95d8023fb2b6cb19916202b2 SHA-256: f08c26698074f15b71a88ab871f2ba3e431408caf7a8a640e0c2b4acea5bf505
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded URLs are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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 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 https://huntic.ru/uplcv?utm_term=street+fighter+iv+para+android+gratis PDF link annotation
    • http://www.shjkyq.com/up_files/FCK/file/tabonudeluje.pdfIn PDF document text
    • https://magnettoptan.com/upload/ckfinder/files/julenakekekox.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/15760833362.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/2793e11e5a97d54c063b73c8178f36d5/12898069240.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/41470168561.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/noretozunalejakuvum.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/fedenipitukiket.pdfIn PDF document text
    • http://skazka76.ru/pic/userfile/76786484303.pdfIn PDF document text
    • http://reclameindex.nl/images/uploads/jokofokedoturiti.pdfIn PDF document text
    • https://olamare.com/img/uploaded/file/vosoremiwetusijatuwadex.pdfIn PDF document text
    • http://www.espace-hotelier.com/ckfinder/userfiles/files/65806290421.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410df05f15e---97926554682.pdfIn PDF document text
    • https://yaslibakicisi.net/userfiles/file/61075395013.pdfIn PDF document text
    • https://turkuazhost.com/calisma2/files/uploads/19868600956.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/8c2731f5ad7e5667395c3f06d69c0e6c/3736003545.pdfIn PDF document text
    • http://kimdaiphatsteel.com/Images_upload/files/rojizesax.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/96128902961.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/97o30ovih1jt8g6pkpqj97iobd/betasakinoragepojaju.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/zajadokosora.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/rafan.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/73991314146.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/80118234d07cdaa0a98cd06864e9868a/69550365762.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_off0000b662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB662 16896 bytes
SHA-256: 80d7d3cafe93aca1f6998813d7cabafd5bff2bdc300229150698a9156b34c921
font_01_sfnt_off0000e1ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA05 10872 bytes
SHA-256: 6ebb1e49cebb07bbe2481a6079352498e765d90b53c40c97a40f1eefc496e750