Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6175fa79c5edc5f…

MALICIOUS

PDF

74.5 KB Created: 2021-05-27 21:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7854a89ebe6ad3ac870b7ed311eada34 SHA-1: 9bd56da42f139ffdbe33fb10be00015bffbbba5a SHA-256: d6175fa79c5edc5f17d9d5af11a08c65db9c70dfd2bb48aa3bfa831c3aa97bab
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the PDF structure itself are indicative of an attempt to redirect users to potentially harmful content.

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.
  • 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://dugedepap.ru/strik?utm_term=energy+pyramid+definition+environmental+science PDF link annotation
    • https://geroguvipem.weebly.com/uploads/1/3/4/4/134465684/selikibesarapad_jujemetafubaduk_wogixa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465145/normal_6019bfb5424f7.pdfIn PDF document text
    • https://xuzatikanuji.weebly.com/uploads/1/3/0/7/130775198/bowag.pdfIn PDF document text
    • https://sijotifibiga.weebly.com/uploads/1/3/0/9/130969940/b52e1f15.pdfIn PDF document text
    • https://nenuxigibasus.weebly.com/uploads/1/3/4/6/134694542/bejebifujovika-juzuwevebuxava.pdfIn PDF document text
    • https://mikatafa.weebly.com/uploads/1/3/1/3/131398449/321c98.pdfIn PDF document text
    • https://pikivazok.weebly.com/uploads/1/3/0/8/130873779/1184823.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466379/normal_604a36a28cb8b.pdfIn PDF document text
    • https://jugusunoju.weebly.com/uploads/1/3/4/6/134625161/32a09d2790a7671.pdfIn PDF document text
    • https://zixavuxo.weebly.com/uploads/1/3/1/3/131398386/gakakevi.pdfIn PDF document text
    • https://zapirawega.weebly.com/uploads/1/3/0/9/130969804/e019818228cd.pdfIn PDF document text
    • https://xamolugasopiw.weebly.com/uploads/1/3/4/4/134468056/8979401.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491723/normal_60567865e7ea3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458628/normal_6004f8290e1d9.pdfIn PDF document text
    • https://tafejopaz.weebly.com/uploads/1/3/4/0/134012310/aff6d5c9f4b4da.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/59d1a113-0516-4d02-8a5d-b0792271da67/how_to_embed_code_in_wix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0b8d931-53e0-49a2-a4e4-8b7c87f63626/teaching_english_strategies_for_adults.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c2da4d0-6160-440e-a6ea-322a1cb626c6/82987630535.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8d7ba0b-625f-444d-a28f-cf55c005b388/isoquant_production_function.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_off0000e635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE635 5596 bytes
SHA-256: 3d0cb74ceac6806226afc501ac7520230805ceedb61079ff7b362acdec7c68a6
font_01_sfnt_off0000f941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF941 10376 bytes
SHA-256: 1deffcb6ab66df8a399030c83a70f1e6067c740e2a70f7355bff12403dacded1

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