Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b7e7eab7de02a2…

MALICIOUS

PDF

87.9 KB Created: 2021-03-21 02:25:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2dda243a939c1b2e0366b1aefafb3128 SHA-1: 8be62adcbab4a43eaba7423328f49386b0ae1033 SHA-256: 03b7e7eab7de02a2f55d312593c97be6a5e60df8ecbcc7ef411411d146f2271d
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning and phishing. Heuristics indicate it's a link farm designed to direct users to potentially malicious sites. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=in+defense+of+food+pdf+download PDF link annotation
    • http://mifirejetevina.getenjoyment.net/zedotifabixojaxixunaz.pdfIn PDF document text
    • http://xiguxivevov.sportsontheweb.net/banking_awareness_arihant_download.pdfIn PDF document text
    • http://bupimobim.sportsontheweb.net/hypatia_of_alexandria_maria_dzielska.pdfIn PDF document text
    • http://zujewubowufonug.scienceontheweb.net/40096480399.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/cultural_theory_and_popular_culture_a_reader.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/64f125a8-dbd0-4b22-8208-4c70148cb6b7/3d_printing_in_medicine_powerpoint.pdfIn PDF document text
    • https://badbb018-ab4e-499b-b788-960949b82e3d.filesusr.com/ugd/4f4c56_28efa6b37e394774ae462ae4b265044b.pdf?index=trueIn PDF document text
    • https://a9864912-ad24-422b-99f3-2d90f7703507.filesusr.com/ugd/d6af85_c7126726660e4862ac4b0eb9fa2a3e77.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/71dcc6db-94b8-4662-8165-2dd4ae42dbf7/stamina_body_trac_glider_manual.pdfIn PDF document text
    • http://limufij.myartsonline.com/reported_speech_test_advanced.pdfIn PDF document text
    • https://26bfc7ce-baa4-43a1-9280-72312523cbd3.filesusr.com/ugd/5af86b_502436cacbff4a8bac7eef2325cc42c2.pdf?index=trueIn PDF document text
    • https://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_f4caa57a9efb48e59b94e04fbbf873e7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3afda679-5b37-40bd-8b40-6b84df4a332c/quadrafire_wood_stove_replacement_parts.pdfIn PDF document text
    • http://zaxuzut.atwebpages.com/lamudekuf.pdfIn PDF document text
    • https://e5aadbcf-511f-4ee2-989a-4410a22eeed0.filesusr.com/ugd/64930c_c339141b9cc847f4894e4bde6052ee61.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/227d696f-dfea-497b-92b8-623caf83095c/gagazoxifufuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27fe7bd4-bcf6-4bc8-9aee-72eedb92e135/what_are_some_example_of_metaphor.pdfIn PDF document text
    • https://a4758657-6aaa-4003-b0f6-1957e800abfd.filesusr.com/ugd/70c1f8_0d300be9243b4c3b92dfc412eec23af8.pdf?index=trueIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_93ab03ef2a194f6fa10fb601b7223cf7.pdf?index=trueIn PDF document text
    • https://0f926834-650c-4d5a-b53c-ad60ae412ccc.filesusr.com/ugd/6a44d8_f12d84b6182143c894c2ef47b76edb59.pdf?index=trueIn 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_off00011bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF8 4968 bytes
SHA-256: e95759266fef9f89d4ea55fe603a4efc41b56f11145cc4ce517f5c9d94916094
font_01_sfnt_off00012d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0E 10796 bytes
SHA-256: 4346e34bc0b4a5820b98587266e4f155058bcb2c26cc3d9b6f7c843a39140fc6