Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e085ce2935dd60a…

MALICIOUS

PDF

84.9 KB Created: 2021-09-13 13:38:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c393b806751fb5dd33450d5c8b6722db SHA-1: 2600bdc9065afe343eb170cc9668aa06b81c7c2f SHA-256: 7e085ce2935dd60a5dc97ef62d54572a2fb427e46b736a713f5acceebc4cb564
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains multiple embedded URLs, many of which point to compromised CMS upload directories or are part of link farms, suggesting a phishing or malware distribution attempt. The 'SE_CALLBACK_LURE' heuristic indicates the document may be designed to trick users into calling a fraudulent support number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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.
  • 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://aan.kz/ckfinder/userfiles/files/80634224443.pdf In PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/71600618796.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/29632820374.pdfIn PDF document text
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/2190597725.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f0cfe5c85a---pokeladigel.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/17562139118.pdfIn PDF document text
    • http://originalavto.ru/userfiles/file/dalujuriwejenosumiziri.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/gagaja.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/33551d759aa8335cb2876455b7da2dc3/65573916781.pdfIn PDF document text
    • https://promenade-perpignan.com/userfiles/file/xusoripesubo.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/vuxezirosepojusabisevijaw.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/68124450845.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/84260003204.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/dc924dac2729561e3e26449de693a1c4/77882476858.pdfIn PDF document text
    • https://arerp.kr/data/file///gifopomaganowegi.pdfIn PDF document text
    • http://hoachattn.com/image/files/47704589029.pdfIn PDF document text
    • http://nextlab-semi.com/files/fckeditor/file/rusuvagesoxabezigufejad.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161306574a991d---raxereroxosonufute.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/mexasemenijen.pdfIn PDF document text
    • http://www.icareonline.net.au/ckfinder/icare/files/mejuxame.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/nolujelususemet.pdfIn PDF document text
    • http://zafirkort.com/uploads/files/71963932155.pdfIn PDF document text
    • https://luckysurface.itweald.com/uploads/files/613e4600c762f.pdfIn PDF document text
    • https://jv-cms.crazy-jessie.nl/uploads/files/dafulawegomakufawo.pdfIn PDF document text
    • http://www.mmgrowersg.com/ckfinder/userfiles/files/23349125422.pdfIn PDF document text
    • https://petandpuppies.com/userfiles/file/68634683618.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/8a07e758f146e6089e6e9b332df27930/nanabakamisebo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=adshield+ad+blockerPDF 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_off0000e891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE891 17652 bytes
SHA-256: aff8b6b3c06db2c7b02ac138a967b204638e307344bfb1b3c5e8ce3bbef7d0e1
font_01_sfnt_off0001162f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E46 10476 bytes
SHA-256: dac85f658de089d69ff0b488cab2b49f4175f89d7015c996dad5c4093c3be4e6

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