Malicious PDF — malware analysis report

Static analysis result for SHA-256 8914ccd330f8f660…

MALICIOUS

PDF

81.8 KB Created: 2021-09-11 01:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c57f15f00b3d25d81570b90de479f98e SHA-1: d62e349b06cce7bc17fce6814a84fc375fd22209 SHA-256: 8914ccd330f8f660cd7e92a489a447daffd1c6a725257eb58dd78691f4b3baaf
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b457acb46e---30131421228.pdf In PDF document text
    • http://goodtraefarm.com/ckupload/files/77122736237.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/87225361509.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/ropuwexotalubigomadojog.pdfIn PDF document text
    • https://classoft.ro/userfiles/file/wutolekelomuguviwiveso.pdfIn PDF document text
    • http://lunaleo.pl/userfiles/file/9032413566.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/pokelatuze.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210910111004.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133228110a3d---loxasig.pdfIn PDF document text
    • http://capital96.com/userfiles/file/nasuximevubi.pdfIn PDF document text
    • http://www.buildonhope.org/file/51112043024.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/53b38ce4eff8766154e36509feca4df9/64539335407.pdfIn PDF document text
    • http://pxmonastery.org/CKEdit/upload/files/18151645378.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image/files/63070240767.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/bivodejasizavaritawaza.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/15290113066.pdfIn PDF document text
    • http://chuabenhxuongkhop24h.com/images/files/2169856779.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/rerirerewaritenanira.pdfIn PDF document text
    • http://retrofotr.cz/files/file/povigebu.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/jugibomepexuxuke.pdfIn PDF document text
    • http://www.ekoforte.com/upload/file/dolawusinonanajowanix.pdfIn PDF document text
    • https://gaadalagi.com/contents/files/lesapivisejusolat.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/misojibu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=imovie+apk+free+downloadPDF link annotation
    • 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_off0000dabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABB 10588 bytes
SHA-256: e177a1c573328d9e13d153682b29b7438c6d8f5bb02cacd6931ab3d6e7c2ec95
font_01_sfnt_off0000f2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DB 18052 bytes
SHA-256: 47bdb33a9546b4bddb1ef15fe5e2bddaf556a4e468cbfaae9fc444f1c4197df2
font_02_sfnt_off00012142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12142 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.