Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4cc0e1914594026…

MALICIOUS

PDF

80.3 KB Created: 2021-05-24 11:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2c4a43089c1bdb8100024e7efa0b64c1 SHA-1: e291173fc65f676076fd0ee01ee37cb288a4e1ac SHA-256: d4cc0e19145940267dbe6f905c2be6a1e742f248e3f2a00bb856d7fa4dfd339a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged 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 hosting, suggesting a link farm designed to redirect users to potentially harmful content or for SEO manipulation. The embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=what+level+to+get+fire+cape+osrs PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382793/normal_6005e4c27395b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453914/normal_60567cbcf3f5c.pdfIn PDF document text
    • https://misugavalemirub.weebly.com/uploads/1/3/4/6/134611185/kabebutinizeruz.pdfIn PDF document text
    • https://zenorawe.weebly.com/uploads/1/3/2/3/132303237/897729.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403946/normal_604dd29d3da33.pdfIn PDF document text
    • https://suxugugufagiwa.weebly.com/uploads/1/3/4/7/134740592/gewabirafopuga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416789/normal_6068cc76a3af0.pdfIn PDF document text
    • https://lodetisider.weebly.com/uploads/1/3/4/7/134732723/povapafekorafiwajane.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457006/normal_60401f3885cfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487424/normal_60386fb8a2206.pdfIn PDF document text
    • https://zedusolurifi.weebly.com/uploads/1/3/3/9/133999882/zufalazikakim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371267/normal_605172256484f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480581/normal_5ffa9af09f073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475588/normal_603633d43c0fe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/cc2a7588-c2e2-4ba5-b797-110f7b7fc540/9800166401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac31ef1a-8f35-465d-921f-f5080c035db6/fopepadasusix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b478290d-a562-48af-8d86-684d73cff8c5/the_age_of_adaline_full_movie_free_download_720p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65aec11d-6f3c-4655-824f-1fe806c4c333/how_to_set_an_electric_plug_timer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9074f958-1d15-436d-9976-00ef15c5e832/23069496219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0acb2f8-df9c-405c-8b3f-bfc35f8dccdb/pipudujumakukawobemabivet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdc627f4-ef48-4de4-9d12-4aa789113967/the_hobbit_2013_tamil_dubbed_movie_download_in_isaimini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7aa9dad-ac53-4ad6-b7fd-5740abbb7d26/memuxubozokepaxokepemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5db44f35-155c-4f10-86e8-171fde47f643/what_factors_affect_the_temperature.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47a51f0a-c623-40d8-8b7c-a5df49c15761/jivoxug.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF033 5032 bytes
SHA-256: 63b9d192da60d77f85225a08f6112700b31402428a40f2cae506d926e983c1e8
font_01_sfnt_off00010183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10183 10832 bytes
SHA-256: 3b54a2341982dfa7312a5544bb642efd0120d27a643e6567da445abc201beff6
font_02_sfnt_off0001268d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1268D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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