Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ca35cb96505cb7…

MALICIOUS

PDF

75.6 KB Created: 2021-02-01 21:38:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 85a9b863239bee34bff81e70aff57965 SHA-1: c5cfa54c9d22769ddb51f82a10d52fed54dbac2e SHA-256: f3ca35cb96505cb721031cc989963ede63e5c32ad8029cc37b6c34829d2c676c
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/aws?utm_term=cavitron+select+sps+gen+124+service+manual PDF link annotation
    • https://cdn.sqhk.co/goberirud/f7CX0jd/air_blaster_ball_gun.pdfIn PDF document text
    • https://nizifaweneli.weebly.com/uploads/1/3/4/5/134589853/kadewe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369629/normal_5fe7c28626ed7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454982/normal_5fe77782b2cd1.pdfIn PDF document text
    • https://nenusobodi.weebly.com/uploads/1/3/1/4/131406558/xisax.pdfIn PDF document text
    • https://zikixitifo.weebly.com/uploads/1/3/4/8/134897390/ximogejebot.pdfIn PDF document text
    • https://gemitipob.weebly.com/uploads/1/3/4/4/134474898/6268848.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzosiboweja/fjEaVih/42764592992.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421218/normal_6010fe12b465f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/dakekalevafumiz.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/a_line_formal_dress_short.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/dubepuxalafu.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/gewedepit.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/acronis_backup_cloud_manual_registration.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/pawabeninixazap.pdfIn 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_off0000e684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE684 5488 bytes
SHA-256: df5e2cc2dc771207285627f654fc227ab443a54b91b2a12bd81b063e8116c410
font_01_sfnt_off0000f935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF935 11864 bytes
SHA-256: c96c89fce899d2f974955804c33a592ef91781155c5d80c12ee5fb5540433349