Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8f574e0a8997582…

MALICIOUS

PDF

63.7 KB Created: 2020-12-02 17:46:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ff7428de47795aaea6c36b10fa853a4f SHA-1: 9380bad20a7ec2bacade10138c04178c76f35f08 SHA-256: f8f574e0a899758234674fb35ecd1b4d705643f3bee108a4451c2ea25870c23c
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 0.9998

Heuristics 5

  • 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.
  • 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://trafftec.ru/strik?utm_term=amc+santa+monica+%25245+tuesdays PDF link annotation
    • https://bozadabeduli.weebly.com/uploads/1/3/4/8/134869561/2063461.pdfIn PDF document text
    • https://zeburunonuf.weebly.com/uploads/1/3/4/4/134458398/931434f415.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485014/normal_5fad68aa917f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389365/normal_5fb4fafa81db0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7914428-6e1d-4df3-8c17-c0a8bc4dc6a5/40004327825.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11c6aec917750a3d920aa/t/5fc335ae4f98375720482596/1606628782796/lanajuzaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df674ab7-c9e3-46c7-b207-646fbff590d0/15659719074.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57ef42bbd740658259ff8/t/5fc6819318e72e5fdbb9b32c/1606844820339/five_below_bugha_gaming_collection.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dde4403f5353fd9590af/t/5fc18cacbc819f1cf4135ec9/1606519982440/sum_difference_formula_calculator.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc38122239b07229141b90e/t/5fc63c8ee6d49a06bb674d0b/1606827150754/16778364286.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1627ad26ff1194f77136a/t/5fc3ce603570fb44d1774a48/1606667877606/93123554647.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_off0000bc79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC79 5412 bytes
SHA-256: 98e11ec08ad7ea1aac5e3260824569a055ec876c02179494e97cb149898a4fb2
font_01_sfnt_off0000cee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE3 10412 bytes
SHA-256: 17ffa2a8d00fce6ce898b8359e8ba5e0e65d23ad5b0fe3b5c85df7070986ac8c

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