Malicious PDF — malware analysis report

Static analysis result for SHA-256 78a206f77e111fc3…

MALICIOUS

PDF

73.6 KB Created: 2020-12-25 11:12:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3a61d9b05765747ebdcf3244ef823748 SHA-1: 22b9858893b17e17aa76f4677f39b5e230ad943e SHA-256: 78a206f77e111fc3f51b403b34df9c06e265cd6936f92cfd34dcf75921856f20
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a link farm designed to lure users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the primary attack vector appears to be the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=the+alchemist+code+movie+trailer In PDF document text
    • https://gajifawegux.weebly.com/uploads/1/3/4/6/134649352/lijenil.pdfIn PDF document text
    • https://jopomewimedadi.weebly.com/uploads/1/3/4/4/134465277/betakidevonas-rovivawofuzepoz-xawokon.pdfIn PDF document text
    • https://kunoloxudiruk.weebly.com/uploads/1/3/4/7/134767428/sefijivetimux.pdfIn PDF document text
    • https://nojarotawufa.weebly.com/uploads/1/3/4/3/134313922/5fb3ace62c2238.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405950/normal_5fa2a41b85eff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372360/normal_5f8945a754a8e.pdfIn PDF document text
    • https://wegupufula.weebly.com/uploads/1/3/0/8/130813429/924228c6e.pdfIn PDF document text
    • https://tabefelob.weebly.com/uploads/1/3/4/3/134372343/meluvegatu.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/ba468acd-0fd9-4cc6-bb8b-f3b0048bab89/vopeburaw.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/surat_ar_rahman_arab_latin_dan_terjemahan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62b3f654-c3be-4f25-8356-79f29c00806d/rulitururaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0d1e7fb-ce06-402e-95a8-44f7aafb6d9d/80789467814.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/48874189744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc819541-c54d-4182-8874-842b2e93c8b1/how_to_decorate_a_bundt_cake_with_frosting.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_off0000e1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C7 5188 bytes
SHA-256: ecdbd53113493fdccd0460148abf6bb6c31d03a2d5b31e4d993c9cb52380de8b
font_01_sfnt_off0000f344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF344 11196 bytes
SHA-256: a15e7e0927b3a8eb2361d4e11cebde174bd6e93169592e3f3a84d2da6cc7ba4f

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