Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4691a394417190…

MALICIOUS

PDF

87.2 KB Created: 2021-06-28 12:20:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d68cbeb60fb7aaad814cf81f39cab654 SHA-1: 5d69d6fdae658809eef83433b341404566a7ceee SHA-256: 1c4691a3944171908e1dc09e496d33c8a75eae35837782b715d3917cb0e27e56
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, and heuristics indicate it is an advance-fee scam lure. The document contains numerous links to potentially compromised WordPress upload directories, suggesting it is part of a larger phishing infrastructure. No scripts were extracted, but the PDF structure and heuristics point towards a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/59618ea739c7b175f69ff93e8844431a/lalodevumipopupese.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160828e8b320fa---wezifudadagojefaxopij.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/9ddd6231d84407974558c19acb531f89/48296481310.pdf
    • http://generaltubi.com/container/ckfiles/files/48464261581.pdf
    • http://davidhammerstein.org/userfiles/file/sijad.pdf
    • http://wwstationery.com/files/file/jifovopijuposimuwi.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/8444a6b55a99340fd7fdf71e37415c1e/nifufuvabujefodesitizi.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b52868e2af7---23801153323.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16087706ea778e---98890251875.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e85cda77a6---zojaraloxegajasadi.pdf
    • https://aneri12.cz/res/file/jovolijimujaxirixipixa.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/b6003f7304277ab528f258a6dbc654c2/40981312721.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4e21493d5---69350197486.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608895242ac08---jojoxemonej.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a5123ad2ed3---jibuxupeso.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160793d722d860---tewelazijuzexofuwamefoven.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c70867d3625---zilebugi.pdf
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/l528fh8uqqob5clb8lmmnjlum6/zoxadufuxikoveru.pdf
    • http://sh-ruiyangcpa.com/userfiles/file/2021-6///20216151725306779.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873cdb3ceab---sudujugijosuriviwaser.pdf
    • http://aggengr.com/uploads/CMS/file/18450242423.pdf
    • http://bidmitt.com/img/files/file/bajajaxugujufe.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607d99d3ac65f---jadeladifubilaveli.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+long+can+you+leave+marinated+chicken+in+the+fridge
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef92.bin
33498e77d0383d20377486b3c188161b54c61e276b89201e25e4dfdf53460add
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF92 11204 bytes
font_01_sfnt_off00010973.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10973 16792 bytes
font_02_sfnt_off00012185.bin
a257f77a4e14ac250c1bf3b529f85fd2d882f6694e99cec45f1c2ca70a23b027
pdf-font-stream PDF embedded font (sfnt) at offset 0x12185 17096 bytes