Malicious PDF — malware analysis report

Static analysis result for SHA-256 59304d537c8671bb…

MALICIOUS

PDF

88.3 KB Created: 2021-08-30 06:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 739a52d7766618483ce6bd3ab0d344d5 SHA-1: 3dd3a22531fde52835d613c1bcce66c5ff654e50 SHA-256: 59304d537c8671bb5c51b3f8ef6b0859985e293524de51b8855a2445d482e71c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms or disposable domains. The presence of numerous unknown URLs suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://28777886.com/Lpf/UPFILE/userfiles/files/molapipuxevixi.pdf In PDF document text
    • http://salon-urody-bellis.pl/images/file/wenesifejafevib.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/bakajal.pdfIn PDF document text
    • http://contelex.it/userfiles/files/64876818712.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/19367075742.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/6e55cfd30f65765dbfa1db43f9a9b276/fimopobikewojobagu.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608761962d013---toresitido.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b89a730846---zumopefamowupan.pdfIn PDF document text
    • http://henanshuangxin.com/d/files/motenetiwim.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/gumeposogitobedofeseruxa.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607676a626044---lapujiworelovipatodalim.pdfIn PDF document text
    • https://flyingfish-stay.com/userfiles/file/47036949305.pdfIn PDF document text
    • http://koala-al.com/d/files/97025929263.pdfIn PDF document text
    • https://www.renfrewareahealthvillage.ca/ckfinder/userfiles/files/jewatifide.pdfIn PDF document text
    • http://phongkhamducphuc.net/images/files/41480666899.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/pemasefafemijegaxi.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/31165935967.pdfIn PDF document text
    • https://horticulturenepal.org/userfiles/file/maresareku.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/94861927471.pdfIn PDF document text
    • https://inncredel.com/uploads/37180058954.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16099f7fe8fedd---menesitefekorasenusom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=dull+pain+in+groin+area+malePDF 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_off0000f652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF652 17692 bytes
SHA-256: 52d3e561d2f85fe6c981847be487f8b0b1dedd5743206599da87f1eaed0cc271
font_01_sfnt_off00012349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12349 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B60 10432 bytes
SHA-256: f5d3e1cf147827f88338da0127559650e958b443be62d171cf4f08b0640ddedc

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