Malicious PDF — malware analysis report

Static analysis result for SHA-256 213355c408dcff10…

MALICIOUS

PDF

74.9 KB Created: 2021-04-07 21:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7333d2ebf3860ea99643558579ec3df6 SHA-1: 10046aa298c38c21f43d4e3a7ecc09847e8480cf SHA-256: 213355c408dcff108685e3491adc394152dd7c973c1c1b3528aeb16ae8de9aa5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://gimoguvi.ru/strik, which likely serves as a redirector to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://gimoguvi.ru/strik?utm_term=hunter+douglas+power+rise+remote+programming PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421611/normal_604698bb3ca0f.pdfIn PDF document text
    • https://cdn.sqhk.co/jojojidatun/hhuibhh/4fun_tv_dance_co_bylo_grane.pdfIn PDF document text
    • http://gazozasi.scienceontheweb.net/64272400121.pdfIn PDF document text
    • http://fiwetud.scienceontheweb.net/96187523212.pdfIn PDF document text
    • https://cdn.sqhk.co/mijajijem/35yihNu/player_guide_for_unknown_battlegrounds_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451753/normal_602a17fa01680.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388063/normal_5ffae6b06cb26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427085/normal_60271cdb1226f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_606c91a195e0a.pdfIn PDF document text
    • http://kevifiregerufug.scienceontheweb.net/tennis_elbow_eccentric_exercises.pdfIn PDF document text
    • https://cdn.sqhk.co/gajeneset/thddjdE/79790090542.pdfIn PDF document text
    • https://cdn.sqhk.co/fegokirar/icKjehb/zodaz.pdfIn PDF document text
    • https://cdn.sqhk.co/tajugajobib/EhiDijA/xamudozataxugafewa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469837/normal_6049778f946be.pdfIn PDF document text
    • https://cdn.sqhk.co/gepabafi/hageKMH/strapless_ivory_lace_gown.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_15c2c2fa958f4f158e5fac74fca497f2.pdf?index=trueIn PDF document text
    • http://naxepedawizozet.onlinewebshop.net/m7_smd_diode_datasheet.pdfIn PDF document text
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_d55d64b92dad4f1f8b4db55f4126dc8f.pdf?index=trueIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_8eeef503ea38465ab4a14adc13f1182c.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_off0000e8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EC 5332 bytes
SHA-256: 7d9873167b78d2b994fabed5e8f1461a05a1f44534c135b6eb1e36612eb72dd9
font_01_sfnt_off0000fb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB07 10372 bytes
SHA-256: c5ae6e2844e7604fd94b32cf564beaabdd379ed5e38f26cff950382c1416e848

Open this report in the interactive analyzer, or submit your own file for analysis.