Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d82330c8264d734…

MALICIOUS

PDF

79.6 KB Created: 2020-12-11 02:34:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 327190c08d69ae0e4a7f400419be9287 SHA-1: 1d562fc82fee39cd269268086794f9bbe1d4e27a SHA-256: 6d82330c8264d7345af285c8dc0bbcdfc70fc8bee023f56fbb3e75a99c3305c1
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-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://traffnew.ru/strik?utm_term=how+did+the+action+potential+at+r1 PDF link annotation
    • https://metumarexidema.weebly.com/uploads/1/3/4/5/134591821/sisonexotujo_pufam.pdfIn PDF document text
    • https://fulodovujigiw.weebly.com/uploads/1/3/4/0/134016909/8994f56122d62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379485/normal_5fb6a8258ce5b.pdfIn PDF document text
    • https://wuwuleli.weebly.com/uploads/1/3/1/3/131398564/2276774.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449627/normal_5fa8e9a22f920.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/tipenubaritisak.pdfIn PDF document text
    • https://zafojepomekosax.weebly.com/uploads/1/3/4/3/134352399/a9c3810d199a9.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/b00db0b5-36da-4855-8bff-88a5b0d15fda/travelers_among_mountains_and_streams_print.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/wuzawolodinuwodusal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/563d6115-d29e-4c8c-8665-7860c549e76f/zuzabijana.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e4d1ea4a794d565eb1ca/t/5fc59eea4f98375720a04eab/1606786796346/39744884615.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0feaf0a2757459be36412/t/5fd04c7f28178304111ebb7b/1607486593608/32053199638.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc531fa405d5340f345b286/t/5fcd8098d336b863f0d9613e/1607303321939/dofezuvulidabaka.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1ae84085bf90c0e029602/t/5fc2ecfdbc819f1cf4399ece/1606610174209/5559203794.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_off0000dc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6D 7836 bytes
SHA-256: 3ad77e3dd1fe195769c96160570aafcab244b55ba571a4e45d19b8d2f975b699
font_01_sfnt_off0000f697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF697 5088 bytes
SHA-256: 941fede96c63e829dd7585a088574b9a9272d266a1ee84f472f7d45b051337ae
font_02_sfnt_off000107f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F5 12328 bytes
SHA-256: 5a9491751e1237d7998994a6eb36802bc1789ca79918ff1a83be1f67fa1d2c78

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