Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0974c72c4551df…

MALICIOUS

PDF

76.3 KB Created: 2021-03-07 13:28:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 34429cdb3b7578c1575a9094944b75a0 SHA-1: b185d45291d4e0f4ff320aabee95e6ad9dbc9454 SHA-256: 0d0974c72c4551df6a79bce1e11a4a02a02a4c3dc6bc4ffde10abcd752d28d53
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable hosting and employing UTM parameters, indicative of a link farm or phishing lure. ClamAV and ML heuristics confirm its malicious nature, specifically flagging it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/strik?utm_term=the+critical+path+in+a+project+network+is+the PDF link annotation
    • https://vajubepodeno.weebly.com/uploads/1/3/0/7/130776779/cc8c61655cb1.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/vojutokekodasufetaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497638/normal_6023bb712d4de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374380/normal_6002bc3e238d0.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/zujulafazajebikarokomote.pdfIn PDF document text
    • https://womominajarizu.weebly.com/uploads/1/3/5/3/135392323/8601099.pdfIn PDF document text
    • http://dajobod.getenjoyment.net/is_covid_bad_in_cancun.pdfIn PDF document text
    • http://zifixoribe.scienceontheweb.net/yamaha_hs8_subwoofer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464700/normal_602cd98d2db94.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/dometic_b59516.xx1j0_manual.pdfIn PDF document text
    • http://pogibofabut.getenjoyment.net/how_long_for_baby_back_ribs_on_smoker.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/fopixeleferegub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446260/normal_6017bab400085.pdfIn PDF document text
    • https://sajosapisede.weebly.com/uploads/1/3/4/3/134344890/6994740.pdfIn PDF document text
    • https://gekubele.weebly.com/uploads/1/3/2/6/132683169/fejemajesefegi_vititolapibodej_gusitaxifizevut.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/153c0a05-e96e-4d72-9157-02316d65b936/kadirixixulavubazitisozen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01c55195-6d2f-42a5-a653-18d597b10a27/83627854545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad08bab5-7976-4bd3-b4f9-7247cd8b5229/who_are_the_goblins_in_the_hobbit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d67e1f39-c916-476a-94c7-e902b560bb2a/61323555559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12798df1-a062-4a0c-afe8-fc3e58f9e8d8/bissell_proheat_2x_pet_pro_instructions.pdfIn PDF document text
    • http://madigekole.onlinewebshop.net/maytag_epic_z_washer_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11a58a28-5dbf-4f74-92d2-699c48a69c4e/how_would_you_describe_tequila_sunrise_on_guitar.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_off0000ef87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF87 5204 bytes
SHA-256: 147455b80dbad6c9f36b238afc354599543d6eccd894eb5c06da3e72f29094e2
font_01_sfnt_off00010146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10146 9864 bytes
SHA-256: 9416be762f026ab3e12f912c1afba5aeb77f2eda4454b08d12e1fc7ff4b876f2