Malicious PDF — malware analysis report

Static analysis result for SHA-256 be381153eaa09914…

MALICIOUS

PDF

97.4 KB Created: 2021-06-29 18:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 389c23ca4d5cfe37efde124348a7d826 SHA-1: 38ae93281561f5acb9a484b9b216d004d0e19d6a SHA-256: be381153eaa09914ac6fd3266791f52263f376d51703908dc14fbcab2e052525
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL structure and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://interreg-ipa-husrb.com/downloads/wugemaxon.pdf
    • http://ankamet.com/userfiles/file/kejobubulubadeneked.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/1hh0och872b48rqlrb33g01scu/8589407732.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/1b9458abd3a905737cb8561ed5adb6a6/67709331857.pdf
    • http://www.jobsincrete.gr/images/_user_na/file/kumegozogeduboweguxufog.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/797e2b74e10e6f9c9b5521c80c8de743/1603143922.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084110bbbfe7---74620648515.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7ebd5788ac---74218833952.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/c334ae32ce4b7b511b785ec77ca8b9d9/gikurabugemo.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/876e14b3a5c1a7a57be695b53d95fa32/jiketezugefesaxova.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609b58edd5b63---25386001707.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608fad9059cde---valipozezidumige.pdf
    • http://brilspa.ro/userfiles/file///filulalilinofu.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8c3d85ef2---nebet.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ea36b97fb---sifudotetofalolixoro.pdf
    • https://jahanchart.ir/data/files/file/jowolokobomijoxipixirup.pdf
    • http://co-wemart.com/careeruserfiles/file/xurujusarejasa.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b7cb9174e3b---diwupikazubonazakukak.pdf
    • http://jyjwqj.com/uploadfile/file///2021053100302795.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/bta3uinbsrqndom39otvftl90a/xafijekenuwozajatugotasi.pdf
    • http://tcsm62.org/uploads/news/file/fuvuxunurin.pdf
    • https://mkontakt.pl/dat//file/jezusagel.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=english+chapter+1+class+11+question+answers
    • 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_off000119f2.bin
6fc0a66005184f9eaf761c48e0b687641d9642f688f3a3e10e6dbbe390501d1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x119F2 17176 bytes
font_01_sfnt_off000146b7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x146B7 16792 bytes
font_02_sfnt_off00015ece.bin
e1ffe864dd0a8d8a1114cc9f00d2485b4103059c8be151d722162cb3bdaeb585
pdf-font-stream PDF embedded font (sfnt) at offset 0x15ECE 11020 bytes