Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46b8f6873d31cb2…

MALICIOUS

PDF

81.6 KB Created: 2021-03-19 06:56:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3d2f5f3a14da13a266454524a8d7186 SHA-1: 775e2751554f94465510fbc745993ef348b014ac SHA-256: d46b8f6873d31cb29748bf22462f9f53553dcdf806c086125cc7f4c0d793a2b8
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many pointing to other PDF files, suggesting a link farm or SEO spam operation. The embedded URLs are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=2002+ford+think+manual
    • https://cdn-cms.f-static.net/uploads/4373999/normal_60290462c9f8f.pdf
    • https://tuvitewolejuxow.weebly.com/uploads/1/3/4/6/134615754/1818714.pdf
    • https://static.s123-cdn-static.com/uploads/4378848/normal_5ffdd4e7b06e3.pdf
    • http://zivemigidefis.mypressonline.com/que_es_un_afiche_publicitario.pdf
    • https://wigabededonekan.weebly.com/uploads/1/3/0/7/130740374/depumek-nuvatizated-dusudenofotupu.pdf
    • http://nutosuvitiraj.scienceontheweb.net/vivusa.pdf
    • https://static.s123-cdn-static.com/uploads/4369336/normal_5ff8030d620e5.pdf
    • https://static.s123-cdn-static.com/uploads/4458849/normal_5fc5f6e276723.pdf
    • http://rejorevubirobu.sportsontheweb.net/sequence_and_series_class_11_formulas.pdf
    • https://static.s123-cdn-static.com/uploads/4451374/normal_5ff91fd6b9b5a.pdf
    • https://radifepibonavu.weebly.com/uploads/1/3/2/7/132712096/adeee67fb45f4.pdf
    • https://static.s123-cdn-static.com/uploads/4374980/normal_5fca13a32c1a3.pdf
    • http://liwurivosopap.medianewsonline.com/mubenev.pdf
    • http://kudretbozaci.com/sazabenadarodubonojiruwa00vt.pdf
    • https://lezanixopedem.weebly.com/uploads/1/3/4/8/134886347/3da7a9d9.pdf
    • http://ketaton.mywebcommunity.org/accelerometer_sensor_working.pdf
    • http://shtangelkipokupkiitd.online/74055602604us5kd.pdf
    • https://cdn-cms.f-static.net/uploads/4383340/normal_6019dc5889f2f.pdf
    • https://cdn-cms.f-static.net/uploads/4426687/normal_60291c6291512.pdf
    • https://totibevopomuv.weebly.com/uploads/1/3/0/8/130813722/telupepiga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff93.bin
56f05743c3c8e86f130239baa06cec81a90658971ff3cae831f5721a36e8eb46		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF93 5212 bytes
font_01_sfnt_off0001111f.bin
5784d3b8d4a48c7492fe340d98cf0c132e8417959aab2ff3a35a4d9a484e3c04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1111F 11628 bytes

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