Malicious PDF — malware analysis report

Static analysis result for SHA-256 563124f55e89dcae…

MALICIOUS

PDF

71.6 KB Created: 2020-11-23 13:24:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9505ee3fb40237b77cbdfcbc09204d4f SHA-1: 2dc0cffe7147c32b894ddec1a21f956d40da1f10 SHA-256: 563124f55e89dcae8438cd0e0ddbe8a6551f0ec3bb59899b72ed0d6e132c4e2e
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://traffking.ru/aws?utm_term=free++spider+playing+cards+games PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5fb01af9a1d85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422876/normal_5f9833d635eaa.pdfIn PDF document text
    • https://rutedidatares.weebly.com/uploads/1/3/4/4/134490949/6906788.pdfIn PDF document text
    • https://verafilutawus.weebly.com/uploads/1/3/4/5/134597792/2811985.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376629/normal_5f905abf1ff62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490516/normal_5fa9bc8767e14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413235/normal_5f9c2bac28b2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403414/normal_5fa710f78ef80.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/subud/60440343628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81172b1a-dbed-44d3-bb0a-7a5565cf4c63/wekatewepuwulisupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0b632e0-1661-4674-ae30-a19ca1493df2/fabotibirivaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/740b485f-ac0c-4036-8319-324897af9bb5/japirabo.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/founders_classical_academy_flower_mound_tx.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/angry_birds_star_wars_3_game.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/air_fronts_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a75e83ac-f540-4077-9b82-6202f0dd5798/21649762446.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_off0000dba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA5 5452 bytes
SHA-256: 14c9643222e2bf2c2c1a93c42568e8760b4e8ae790cacd1b53a9912b1402cb38
font_01_sfnt_off0000ee2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2B 10472 bytes
SHA-256: 479f57a725793e743991ea873afd77f7fbfe3f7a4ac3335de9e91ea1f333ed86

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