Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ea8f26ec0f7f2c1…

MALICIOUS

PDF

75.2 KB Created: 2020-12-18 19:30:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: a330ff70e626f49b21c89f9feaa97d24 SHA-1: 7f776ee2b23a31663415579f9b6e10f1b4b5bcad SHA-256: 3ea8f26ec0f7f2c19b6cad1580210c711e00f1ee9b9c4a37c4cd454206830a9b
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'geometry tangent worksheet'. The presence of a callback lure heuristic further supports a phishing or scam intent. The ML classifier and ClamAV detection strongly indicate maliciousness, likely involving exploitation or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://gettraff.ru/strik?utm_term=geometry+tangent+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369797/normal_5f89d41b3d961.pdfIn PDF document text
    • https://pudukodup.weebly.com/uploads/1/3/1/4/131407572/rebidosobazeroniz.pdfIn PDF document text
    • https://fategebedabeno.weebly.com/uploads/1/3/4/7/134718848/sokurinom.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/bozepi.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/kasibe-mibotuwesetoz.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/xujoko.pdfIn PDF document text
    • https://panebafizi.weebly.com/uploads/1/3/4/3/134365464/luruxejevogetebotu.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/xupin.pdfIn PDF document text
    • https://ruparowix.weebly.com/uploads/1/3/4/3/134350000/dusikud_favutasagalifef.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://s3.amazonaws.com/sefiwegegagu/19595155947.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/98268903081.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/80790398052.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/75380726612.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/44237781066.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/that_wedding_jillian_dodd.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/bosufasa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FC 5096 bytes
SHA-256: d63f2b3ae660779efc2eb09a40fbbd1d6cdea52b8c8b9fb2f9b74db5410049dd
font_01_sfnt_off0000d939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD939 10360 bytes
SHA-256: 4dff828fe1b69ca476c4c0a1d3b75dcfd7edf038508455cd5f9d9a7f52075c68
font_02_sfnt_off0000fcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF0 16076 bytes
SHA-256: 15149a6a8f144fb3931aedeb09ee1217c15cd30ee146f38147c9e0535946bf0a
font_03_sfnt_off00011196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11196 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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