Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c6fb2adb18caaf…

MALICIOUS

PDF

81.6 KB Created: 2021-03-31 10:40:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b8443b2d98ef48be0c981df8262a9945 SHA-1: c51e55503b8964f3a96e6db1d8bb891de5da3402 SHA-256: e7c6fb2adb18caaf98c71d6e2b94085dad7463612566bfa22b1ae7e0a5474056
244 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or known malicious redirectors. The heuristic firings indicate this PDF is designed as a link farm, likely to distribute malware or conduct phishing. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=dragon+naturallyspeaking+premium+12+edition+free+download In PDF document text
    • https://cdn.sqhk.co/kojagopomon/h0QghWW/vugegifug.pdfIn PDF document text
    • https://megoximigiwuboz.weebly.com/uploads/1/3/4/5/134579220/2330855.pdfIn PDF document text
    • https://cdn.sqhk.co/pifajaloro/ihhe3CR/digosokoku.pdfIn PDF document text
    • https://kiwedudibobo.weebly.com/uploads/1/3/6/0/136097088/9262992.pdfIn PDF document text
    • https://kijomexed.weebly.com/uploads/1/3/1/0/131069838/metipozune.pdfIn PDF document text
    • https://cdn.sqhk.co/kokowoxiwi/pgggdt7/trust_crypto_wallet_download_for_pc.pdfIn PDF document text
    • https://simebofes.weebly.com/uploads/1/3/1/4/131438459/235333.pdfIn PDF document text
    • https://monopulo.weebly.com/uploads/1/3/5/3/135311873/fetelogajedexob.pdfIn PDF document text
    • https://cdn.sqhk.co/xasexuwosul/jijhjim/92857599405.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/iguidgh/best_hits_of_the_80s_cd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_6c4b0b8ef2534bb290e807478606084a.pdf?index=trueIn PDF document text
    • https://28932ed2-21d9-4123-99cb-fcff0aac4472.filesusr.com/ugd/cc089a_d2b19307374049a387febf0f79a746e8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fekife/linksys_ea6400_issues.pdfIn PDF document text
    • https://eeeff038-21f9-42a6-bde0-cd945221d618.filesusr.com/ugd/9dc459_7849a2c8375041c0855fcbcb36ad1032.pdf?index=trueIn PDF document text
    • https://849cba27-c1c2-4801-a47f-514a08c45c3c.filesusr.com/ugd/7f7a2c_bc999436d128477ea5a3e2fdec69686e.pdf?index=trueIn PDF document text
    • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_ec1f0b4277a94cab9cc017f4229ffeaf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zowejunef/how_much_does_it_cost_to_paint_a_cessna_310.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/josuwuvilonuxakoxota.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/baby_s_day_out_movie_hd_free.pdfIn PDF document text
    • https://99f4a897-b223-4833-863a-50ad465ba5d5.filesusr.com/ugd/8e2371_73b038f7f73340c2afe78c7c36029b84.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/44593270515.pdfIn PDF document text
    • https://f621ecf8-e26c-4db3-9bdf-176eeceb312d.filesusr.com/ugd/b3755e_457237d0c3064f0d973b1034dc64a6a0.pdf?index=trueIn PDF document text
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_78cf9a92829749a0875d5d97dd2f3fc7.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_off0000fe1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1F 5804 bytes
SHA-256: 35692c0a5c4a49ec414187f87045061c471ea2b76299b6f95f5bb5f2aea12b7e
font_01_sfnt_off000111f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F7 11312 bytes
SHA-256: 2c8b9e0bec049dcfacfd03dbb27a7a392bc2a0be5d7a445d3cf32bdccc06f86a

Open this report in the interactive analyzer, or submit your own file for analysis.