Malicious PDF — malware analysis report

Static analysis result for SHA-256 87622ae74615653f…

MALICIOUS

PDF

66.4 KB Created: 2020-12-02 15:29:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9e73d5c760312907acb59e30ce8c534e SHA-1: 98901314fffd83b090e49cec3461a54e9853285a SHA-256: 87622ae74615653f9891a53a2b63d0170f56327205d1fdd5d9721ac503eae9ff
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffmen.ru/123?utm_term=ariens+11528le+manual In PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/7392724.pdfIn PDF document text
    • https://komomofuxuz.weebly.com/uploads/1/3/4/4/134494735/4285460.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475577/normal_5fc6920896990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373504/normal_5f97c3cd32fe7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0879da3bf4b14aba759f2/t/5fc3206cfa04221c7186c63e/1606623341647/25272502708.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a889486-31b0-4415-9712-838f093c23df/tafijobidezilowitaw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc379dc9698b02c7f30eeb0/t/5fc5c8f5f81c9a2a0c6c2473/1606797561149/3392462346.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c4ea2f2-8191-4ce6-bec6-cb85089112a6/labofiraviletiwed.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe19379d7936484056c845/1606293815907/st_205_75r14_8_ply.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eafaf220-7f7f-4a3f-8d1b-7f41a3ce131b/dakifegulogogonoxufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d837a8cd-70f7-4501-b08a-873876d1f9bd/sigeximovenonax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/561b873a-033b-410c-8301-443c20dcb69f/suwojivisujusa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2b040e9fc3622d52da05d/t/5fc4cf523f75b166436b7dc1/1606733652343/bulinibopizijifomo.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_off0000c29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC29C 5320 bytes
SHA-256: b3d19dc1a3830616afb4cd06a15067164bd1f5ca1d3e9436c894e061c2c932ce
font_01_sfnt_off0000d4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A6 12548 bytes
SHA-256: 6a62873bb7a1f354f8e448759bf343d664d2200f51471445001493cd805f9be6

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