Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1a980765e7c706d…

MALICIOUS

PDF

184.1 KB Created: 2021-03-15 18:07:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d9f5d784b8478b3a68db89c490881c23 SHA-1: abb9c4ee41eb183b46c83df9c3b55c563c241bb7 SHA-256: d1a980765e7c706d7818c719a24d75c3683b85d79302c0b98f44a4ef3f9349f2
126 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, suggesting an intent to redirect users to malicious sites. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://bologen.ru/wix?keyword=malpass+corner+elementary+school+nc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460980/normal_6027e68f57ce7.pdfIn PDF document text
    • https://vowomupow.weebly.com/uploads/1/3/4/8/134846305/nipukemos-bavozune-kuxufaripa.pdfIn PDF document text
    • https://roxoxadedetep.weebly.com/uploads/1/3/4/5/134520556/7775313.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450140/normal_604989dfcb6f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501775/normal_5feb3a03e225f.pdfIn PDF document text
    • https://latiniwujuxemuw.weebly.com/uploads/1/3/3/9/133997677/1e3465502a28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450636/normal_604e6393175ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371005/normal_5fd082dbe170e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420018/normal_6000f5ba24c4f.pdfIn PDF document text
    • https://nekawamanijem.weebly.com/uploads/1/3/4/8/134877182/5521745.pdfIn PDF document text
    • https://zademufexek.weebly.com/uploads/1/3/4/7/134765537/7419910.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417216/normal_60162753b4d75.pdfIn PDF document text
    • https://tadilagene.weebly.com/uploads/1/3/1/3/131381422/juwulo_pesexorebumi_wazapajas.pdfIn PDF document text
    • https://gijagexerifaru.weebly.com/uploads/1/3/5/3/135322880/nukozajixati.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_5feaf3ba00557.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_6031205327fff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459170/normal_60218805f1929.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408176/normal_5ffef12099d06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493579/normal_603085baf20b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406501/normal_5fdb323660885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488101/normal_6049d0d9e9acf.pdfIn PDF document text
    • https://nilukosezaxed.weebly.com/uploads/1/3/0/8/130814529/zadajexezezazaf-wovamopujemalo-gapozu.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/de4ba80d-09ae-4008-8e0a-090acd738392/89070202231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eabcfb9-b203-40c1-9578-71d8aa605a68/introduction_to_game_design_prototyping_and_development_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abf32bf0-d8a4-4e16-a854-859b6f558733/libro_de_espaol_segundo_grado_lecturas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57438106-c5a3-455e-9c46-55566bd4c32d/engineering_drawings_examples.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_off00029ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29AD8 5280 bytes
SHA-256: 97af83fbf409c07f9a37a8c527a6e7cc40f1ad3c0c41bdc345ac0e54e69c1cc8
font_01_sfnt_off0002acb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ACB1 11380 bytes
SHA-256: cdc9d2698d966eba232d58f1b1eef698fef4251fa79f8a36f9eb55fbcc28b6b3