Malicious PDF — malware analysis report

Static analysis result for SHA-256 d67753220cde379f…

MALICIOUS

PDF

62.6 KB Created: 2020-12-13 23:58:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e8a304b4b46b39d839f210c06043826f SHA-1: dd02eae4b9d7742d327f0ab367bd56affef20614 SHA-256: d67753220cde379f7832ceedc6cbbc39a57004ee8465381797698880a22f2b97
186 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 0.9998

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
  • 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.
  • 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://trafffi.ru/strik?utm_term=punch+sound+effect+soundbible PDF link annotation
    • https://pufetebad.weebly.com/uploads/1/3/4/7/134711346/9f059aa5f62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378165/normal_5f9f68c9a90b3.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/831f072bc99.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/2992456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378171/normal_5f9b8e9d7dde5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373271/normal_5fa1c49b39c77.pdfIn PDF document text
    • https://fubomagasikeka.weebly.com/uploads/1/3/4/4/134474343/2224490.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1787595.pdfIn PDF document text
    • https://jugoruzaja.weebly.com/uploads/1/3/1/4/131407370/wudixepumaxun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f9a48337dd3f.pdfIn PDF document text
    • https://sigozebuxofiko.weebly.com/uploads/1/3/4/3/134372047/f6e85ae8.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://uploads.strikinglycdn.com/files/c5f37ec2-09a6-4d71-9fe2-b63aaab939de/76228386261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24ff8fd4-8fff-4114-b526-663b1e8a83d9/penijigekixasifosiduso.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc298325e8e827d4298aebe/t/5fc62d5dcb3e0f5771229b5a/1606823267366/las_vegas_visitors_bureau_phone_number.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc729ac418d7934ac758fa4/t/5fd6157f154d727871e290d2/1607865728197/87660697115.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0918f56-4956-4ec3-86fa-69b12377a4a2/wonny_kot_tekst_piosenki.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD35 4828 bytes
SHA-256: 1723f7a303e198943e69b8d5dc536efc62a8b15a59d1eafc9832554ce3d70e7d
font_01_sfnt_off0000bd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD8E 9812 bytes
SHA-256: f2bf663dfe39c276e141dad9ac297f86b19996fa193f334d1f4baf8a9f8afe86
font_02_sfnt_off0000df0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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