Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f7a49d093fcd707…

MALICIOUS

PDF

111.0 KB Created: 2020-11-25 00:48:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 120158e0dee3fb9912af41b25722e52f SHA-1: dac706aae330921db5d5b8b3aa9964c0cf2f5d8e SHA-256: 5f7a49d093fcd707d6a6c1e4450985f8ffd6fdc502dd67a774508f125f48c9c3
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://traffine.ru/aws?utm_term=ffxiv+arr+sightseeing+log+guide PDF link annotation
    • https://zotorakiv.weebly.com/uploads/1/3/0/7/130739478/bixupakibivewe.pdfIn PDF document text
    • https://mujunoba.weebly.com/uploads/1/3/2/6/132682006/zopafipiniruboreju.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/3057652.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/zadexusu.pdfIn PDF document text
    • https://zokunokakepano.weebly.com/uploads/1/3/4/3/134353677/80ed849e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/64571138861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e917a06e-2d96-445a-aa8f-59d66b87fd2a/saeco_intelia_deluxe_hd8758_57_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a182aa2e-3a5e-47cf-93f0-fa71d149c236/41738255634.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/wukotesibafakoxudeniruges.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cafd2bf3-78ce-4865-814a-dad2e922a690/club_penguin_card_jitsu_codes_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/64841506428.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/autobiography_of_a_yogi_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/286d6af2-3af8-400d-a962-3d72007b8965/six_not-_so-_easy_pieces.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_off00017883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17883 5252 bytes
SHA-256: 604264c95451efc1c44496e62b48ea85ac04721d8760efe75a8778ed8ba5f118
font_01_sfnt_off00018a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A66 10752 bytes
SHA-256: 9c95f4c2b21fec0a918a54b80f546ab1fbcce3ce76fe312dfffa5853d4ca195f

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