Malicious PDF — malware analysis report

Static analysis result for SHA-256 199adeba541151a7…

MALICIOUS

PDF

83.0 KB Created: 2021-07-03 03:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6dae5ed5c8f086dee3f88c8119482be6 SHA-1: efbfcd2ff57b326c10fdd5eb775ca0ca7c3f8ca6 SHA-256: 199adeba541151a767a9b482224e95428a862e15c4e8f57461bc81554aa1d57d
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised WordPress upload directories and other disposable hosting, suggesting it's designed to lure users to malicious content. The presence of a link farm and the use of UTM parameters indicate a phishing or SEO poisoning attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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.
  • 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://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/gupanekufonorom.pdf In PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160d2d8250148b---voxawivexazeko.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c79d125c2b4---59181843814.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0d26c6651---vamaxopineraxilezujisegu.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160978d3a5462c---60098293365.pdfIn PDF document text
    • http://inspirationforexcellence.com/clients/66491/File/76486079607.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/dosafipuwokarajote.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/96458384054.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3cb999e08---faside.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/437d142e01970e02550729c32b9445eb/pokofirumafoxedeloxa.pdfIn PDF document text
    • http://minipit.com/data/files/6929718265.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160df92549aef8---wuwifidera.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/o561ic9u44km4rs047mjainh70/gevajowegonebup.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/9dd06a2e216641cda069e06937908f87/pupuzegerazafok.pdfIn PDF document text
    • http://hillcresthigh1971.com/clients/9/9f/9fbf9047a6869172a982db6f42f05a9a/File/69024929426.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/0dcc0df3f9e1df638ca3ff381402ae81/79129783991.pdfIn PDF document text
    • http://gpszone.hu/upload/userfiles/file/75965439813.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/qhif5avomfuct75j26hj6ni3gb/60843466121.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/dfa2260238bd920cd5d544a774333958/41311660277.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16072171d0529b---60811188245.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/rovatowasipib.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2aece04d13---wubimijenenotugoxonuji.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/bitivalozusaradikijisufaw.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/93613206980.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=find+equation+of+line+given+two+points+calculatorPDF 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_off0000e078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE078 16848 bytes
SHA-256: c5cfb0798c0d3a44ddcf82e73e1caa1cf508f9d2c7158d5ff182bfc074ed7c57
font_01_sfnt_off00010c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001249c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1249C 11168 bytes
SHA-256: a9716b0947b151b5d1735be753b0b4d4fd24ed336a5faeeace14a715c1029f7a

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