Malicious PDF — malware analysis report

Static analysis result for SHA-256 de8a6945f6bf5583…

MALICIOUS

PDF

70.3 KB Created: 2020-12-15 18:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 8e3ad80986f8a466ff75b334fea9ec86 SHA-1: de5e608d8472328e189b344cd7a7408f18ad1df6 SHA-256: de8a6945f6bf5583e081962efd4d9ed1ed933899ae37a5a516824230ab247da8
156 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://trafffe.ru/strik?utm_term=porter+cable+20v+battery+charger+manual PDF link annotation
    • https://sobuxiba.weebly.com/uploads/1/3/4/8/134867950/xugalemug.pdfIn PDF document text
    • https://motutipe.weebly.com/uploads/1/3/4/6/134674000/ludunasafifolul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495402/normal_5fd66bb1bc73f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420586/normal_5fca979977d3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379611/normal_5fbf19144f0c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501364/normal_5fabec4f5d0b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f88b401537a8.pdfIn PDF document text
    • https://zukepuroxile.weebly.com/uploads/1/3/4/7/134746995/zoxixetapomuxif_jesopamomovutu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393901/normal_5f9d939f1fdcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409796/normal_5f94a19804585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385413/normal_5fa50cade90f0.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://static1.squarespace.com/static/5fc12af63dfdd95b60d6c240/t/5fc9a3ee196a600d3c2ce6df/1607050223331/zufozamesonisad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fc3b38b-3b64-402f-bf5c-d369aa68fc3a/fertilitatea_la_femei.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ccb701d-34b1-4c55-a3fe-65034ee316c7/47573488819.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd008c14dfd36feeb1b6e/t/5fc1a63d1972c46e3cdcb86d/1606526525678/34098467392.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_off0000b0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0EF 5448 bytes
SHA-256: 511b9067ccc46db07f40d9babdc03f3fc91d8fcab3bb068f216b7e1af5364e92
font_01_sfnt_off0000c359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC359 10116 bytes
SHA-256: 1eb83ac07947740b7535f2a511035dbf34c6fe6b549124ba134c6ecbfc0384c2
font_02_sfnt_off0000e604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE604 16196 bytes
SHA-256: 7279e17af1e02fd0f3ef997930705907ffabfba99e9efaabfaf00d6d06097595
font_03_sfnt_off0000fb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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