Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd222eaea8971a8c…

MALICIOUS

PDF

68.1 KB Created: 2020-12-19 20:16:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8876f147ca1245ad312fa967ce5c4e49 SHA-1: 9d39bd40956cc93e882e6cf258c1d611cfe4754f SHA-256: cd222eaea8971a8cd582bc4dcdbef3dfa7481a76c114fc849d82f849e7dcb6dd
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though partially corrupted, suggests a lure related to 'Jingle Bells music sheet for piano', which is likely a pretext to encourage users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=jingle+bells+music+sheet+for+piano PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403823/normal_5fd7253b5d9e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5f8c9ecc0677f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451545/normal_5fc40032b56e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414342/normal_5fd2706863255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5fb9fee2ce090.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/089c88ac-4cc3-4358-93f0-fdca343b05a0/bupujogawifigiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/pdf_file_test_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd1e0c89e1c4b8fb81223/t/5fc29b02f8cdb769c6386764/1606589186810/32629028979.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/xetinedo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c01d473c-0404-4032-9a16-0227eb8efb17/tally_formula.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd458912e20d66685e56d5/t/5fde305b91828d0f5d3daeef/1608396894664/80809724498.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/678b83d3-3335-4b66-a42d-b24089020657/cause_code_97.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c0a56c5-eb27-491d-95ac-17ade22f3245/ragnarok_mobile_pet_list_episode_6.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/zafolifapajo.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/the_omnibus_budget_reconciliation_act_of_1990_requires_that_large_group_health_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba0d108-3b5b-4356-ab70-c49a19486fcd/99810699583.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_off0000cdad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAD 5556 bytes
SHA-256: 26eb2a1b341cd32c503b1ff56c92fa4b28d484be127e4818e216ca4ffd7ea847
font_01_sfnt_off0000e065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE065 10244 bytes
SHA-256: 2df71c6551e673986463fabf16da5e35b378455c6cdf4d56759077774ae57a25

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