Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa797daa4ead29b2…

MALICIOUS

PDF

81.1 KB Created: 2021-09-20 07:37:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1c54ab44278665e9e707b529d7fbabaa SHA-1: 9e57ba423a60c7d881ae912ae82f92ee756f69f8 SHA-256: fa797daa4ead29b2853e6f4198a0fd8d4c58ce470e16e402c125173421e2566f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external URIs, including one pointing to a raw IP address and others hosted on compromised CMS upload storage and disposable hosting. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classification strongly indicates maliciousness. The presence of multiple external links suggests a phishing or redirection scheme to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://wastran.ru/uplcv?utm_term=omegaverse+books+read+online PDF link annotation
    • https://hargagila.com/uploads/image/files/xomejo.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/vetaxagafuketakenomorovo.pdfIn PDF document text
    • http://e-sheremet.com/img/94107481341.pdfIn PDF document text
    • https://ijfbacknumber.com/editor_up/28142269454.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fdcde81aea---80151250932.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210910_065436.pdfPDF link annotation
    • http://baoveantam.org/upload/files/69363057817.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/fevisoxopasoba.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/jigewanukatud.pdfIn PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/siwedusunax.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/userfiles/fichiers/zuxivebefewizepudekoroz.pdfIn PDF document text
    • http://cleanking.net/userData/board/file/dawubigetixavavilivatuj.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cfaca0cc16---2738120661.pdfIn PDF document text
    • http://www.moyekolodin.com/files/boposabowamafugu.pdfIn PDF document text
    • https://matfplayer.com/calisma2/files/uploads/89646018329.pdfIn PDF document text
    • https://learningsolution.ca/userfiles/files/43084622593.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/minerudazulikatas.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d649190f75---givikofidiwujadunure.pdfIn PDF document text
    • https://www.adoz.cz/ckfinder/userfiles/files/nawifejal.pdfIn PDF document text
    • https://ev-owners.jp/userfiles/files/wubaj.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc4c2c1298---28573873725.pdfIn PDF document text
    • http://ituor.ir/basefile/chartermeinfo/files/53268377630.pdfIn PDF document text
    • https://udruga-invalida.hr/files/20154387827.pdfIn PDF document text
    • https://accounting789.com/ThImg/file/85315407716.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_off0000d899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD899 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AB 17544 bytes
SHA-256: 360d6cfe8b1a394a59f6f1ba55db8551d17225b5019b174c8151b590b0400018
font_02_sfnt_off00011e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E47 10816 bytes
SHA-256: 3a0b1a4a31317b349639a8e297093791e5986cf2c9c8268dbf7cd44078035350