Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b6422ffea28e05…

MALICIOUS

PDF

102.2 KB Created: 2021-06-29 23:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 090037c26afd82f056d7ad71f339715b SHA-1: 11cac65329a842778f2a6fb9f181384b18e0610b SHA-256: 60b6422ffea28e05ce58912be5dde31e62c0b531bc0f8685458b989b9f030869
156 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 https://crysiq.ru/uplcv?utm_term=beginners+guide+to+digital+marketing+pdf
    • http://omegapizza.net/uploads/files/17901061538.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089cf911ce0e---11012219684.pdf
    • http://tafgambiatours.com/userfiles/file/taxavufuzi.pdf
    • https://mt-creativestudio.com/ckfinder/userfiles/files/tepavegile.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16089b5b333e94---94414909204.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/c1e12dc73f52d168c760f00bd365b909/jonopesafu.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/560f43fe9a33159ed5fa03eff933e224/fibemid.pdf
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/5568084114cff94862fde384a4ca6583/50709316311.pdf
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/jo3n3jpkmt0a0he4ogkhqhrsbk/34613385137.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04f2d33c85---pamow.pdf
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/73054380251.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a824c0c99---juvuka.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85a41e3020---wukorixovafire.pdf
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/juxinalimidepo.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/uos2ulj2mio9uq4gq1d01fbjfb/62434756733.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a8dab3443---nulalujuvesopa.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/nqlpf1g76peuaqig0bc4em9b1m/52142341004.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/317r8cek5ef7etec0vlr7l4f1c/furibakefomaxazimikadar.pdf
    • https://towa-aaa.jp/userfiles/file/49497499473.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/68d0c476e1229b3b59327bb24f997327/1394128222.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/1c8mq28o60ujls4hobt75pjo7j/62733784934.pdf
    • http://marketherballize.com/ckfinder/userfiles/files/47508343495.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5e953534a---74677214129.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/3009cfadf354e1b8b77a9f9b12c21ea5/nokekiviju.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a8370824525---8201827320.pdf
    • 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_off00012aa5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA5 16792 bytes
font_01_sfnt_off000142b7.bin
93a2a5e2a7778120dc9c7e9cb85ff919bc217eeddc066436b9c0aa41704d9ec6
pdf-font-stream PDF embedded font (sfnt) at offset 0x142B7 17276 bytes
font_02_sfnt_off00016ff0.bin
78299b41eaf65af755f2f4b962857c0e1b3eac07a0fc8ac61b3be3d455da4b88
pdf-font-stream PDF embedded font (sfnt) at offset 0x16FF0 11084 bytes