Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe92cec4d147d750…

MALICIOUS

PDF

79.5 KB Created: 2021-03-20 01:35:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 356aafb1b85515312aeb22c00ddffa5e SHA-1: ede534272b050130af20ef3ad3c977054a0cb127 SHA-256: fe92cec4d147d750a98ce8e0034711465c7f5d716b423eee23408384f851bbe3
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier indicate malicious intent, likely to redirect users to phishing or malware sites. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to drive traffic to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://soxebez.ru/award?keyword=nsaids+drugs+classification+pdf PDF link annotation
    • http://study-english-02.space/powotutetuganavedc30i.pdfIn PDF document text
    • https://jagewimaw.weebly.com/uploads/1/3/4/0/134012974/zuludavevukom-gelinadagiweve-kurobuxe-nilebifiba.pdfIn PDF document text
    • https://jetisinodab.weebly.com/uploads/1/3/5/3/135335938/4303366.pdfIn PDF document text
    • https://guferewefozitak.weebly.com/uploads/1/3/4/3/134393558/girep.pdfIn PDF document text
    • https://gafukarufigak.weebly.com/uploads/1/3/5/3/135309608/sunozimi-rimenudu-wujezujejajanab.pdfIn PDF document text
    • http://italywom.space/angry_birds_go_pc_setup_exe0wmpy.pdfIn PDF document text
    • http://lowwsaw.xyz/77665121144co0ur.pdfIn PDF document text
    • https://cdn.sqhk.co/givogaduta/hhfBjim/kivezumivonedanobateluji.pdfIn PDF document text
    • http://imedo.ru/canon_in_d_violin1k2qk.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/iJ1nrgg/cube_crush_paypal.pdfIn PDF document text
    • http://habercigo.com/nupowanulizawesavatarujipf2k0.pdfIn PDF document text
    • https://binewetakug.weebly.com/uploads/1/3/5/3/135326509/6a4b764f5.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/VjjjdaW/canned_diced_tomatoes_with_green_peppers_and_onions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6196782e-cf18-4b18-9827-03627358b06e/jugexatozubuxisofe.pdfIn PDF document text
    • https://ca483b97-61ac-4196-bca0-6b249c18eca9.filesusr.com/ugd/b27199_f37812d1da0d48d394932b9ffdb63ef6.pdf?index=trueIn PDF document text
    • https://7fca5364-97a1-4441-b76e-d2c429a59218.filesusr.com/ugd/735424_8a9e9bd63e20402290948fb1893c396e.pdf?index=trueIn PDF document text
    • https://d33b8dfc-9792-4d26-9d81-613d0bd32a71.filesusr.com/ugd/d34367_c2d820a63d6b4e2d9d31cec51d4cd191.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/avira_antivirus_security_apk_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b4ec762-02b2-4dcd-b5d0-85d839a3d418/what_does_know_mean_in_the_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/pemorarepon.pdfIn PDF document text
    • https://d80868e2-5d34-4dda-9345-0396294a35aa.filesusr.com/ugd/f9fac6_1b7789c608514c67973dd1cd21828181.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EB 5292 bytes
SHA-256: bea32bd61ac0a725bd51d8f05da0fe414d164c30631263fb6b00e1ddaa6e9c53
font_01_sfnt_off00010c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C02 10788 bytes
SHA-256: 088d511454c1ccf31d84fd40fef97e513b462f175f136f8f835db5616d5874a2