Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5de466eb4469cad…

MALICIOUS

PDF

88.0 KB Created: 2021-03-20 21:16:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 42c68b1ff9b30b7a2603a77b44ec1637 SHA-1: 1a2f56e8035e08186c44151888b4784d50e6eb57 SHA-256: d5de466eb4469cada9be099fc9edc65344e699859863f894fa27785bf558b799
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous external links, many pointing to disposable hosting services, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, contains keywords related to psychology and PDF, aligning with the external URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://pelibifir.ru/award?keyword=sociopata+definicion+psicologia+pdf PDF link annotation
    • https://nenawopoweso.weebly.com/uploads/1/3/1/4/131406478/telodelopuzol.pdfIn PDF document text
    • http://greyfruit.space/divuzojupofujekiwb4mp9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458840/normal_60376524a752e.pdfIn PDF document text
    • https://talowitutujuf.weebly.com/uploads/1/3/3/9/133999148/3372356.pdfIn PDF document text
    • https://noromilo.weebly.com/uploads/1/3/4/5/134587763/fac1f99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490539/normal_6037588519e0e.pdfIn PDF document text
    • http://dorightunion.com/siberian_mouse_catalog_2012nbvp8.pdfIn PDF document text
    • https://zibinileder.weebly.com/uploads/1/3/4/7/134748255/882068.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419211/normal_5fcd6178d4d28.pdfIn PDF document text
    • http://gufutaca3.xyz/sistema_hexaxial_de_baileyun13w.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/i3ghghk/wutafasuvotidomufesowi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422135/normal_600c68923e84c.pdfIn PDF document text
    • https://cdn.sqhk.co/xalisufa/P2ieAic/f1_car_races.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://4b4b92a8-4ac5-4030-97d5-af0917f8c077.filesusr.com/ugd/0251f0_96faa97ba9604cbdbe5506d83ab302c0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f889fa69-ad37-41a0-ad6f-bb3c4ab171bd/plantronics_cs70_nc_headset_battery_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e20ca7d-5869-482c-949d-817820355efc/tulidigeveporivov.pdfIn PDF document text
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_b906f6252e214813b202b15161e05f65.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2886692b-7401-4fef-a60c-51ea73b05e99/sunotagenavomebuwagisin.pdfIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_0f741b9ad1494592813f0148d88d0783.pdf?index=trueIn PDF document text
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_5e6edf5f576f49379a5cdde0dd7586a9.pdf?index=trueIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6A 5120 bytes
SHA-256: 4ca252f5e6952b31e1d319728783b630fcf6b6681f817752b4a33ca0a8b9172f
font_01_sfnt_off00011bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD3 11980 bytes
SHA-256: 246a130c0815666b432e00d1aca0dd37f94919e3b2357137428268700899ea1f
font_02_sfnt_off000142ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142FF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f