Malicious PDF — malware analysis report

Static analysis result for SHA-256 c586c248cfb9bf05…

MALICIOUS

PDF

72.2 KB Created: 2020-12-20 23:43:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ee757e84cac10649a02d4e058947291 SHA-1: 1879ff9cfcea98719356d7e1c37aa120ad81d5b2 SHA-256: c586c248cfb9bf05f34ad2314b2437b84d48f6d5ad41f7abc29982a3f063dd3b
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains an embedded URL that redirects to a suspicious domain, likely intended to trick the user into clicking it. The document body, though heavily obfuscated, suggests a lure related to "funny anime stickers for whatsapp", aiming to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://trafficel.ru/strik?utm_term=funny+anime+stickers+for+whatsapp
    • https://static.s123-cdn-static.com/uploads/4427781/normal_5fce106841bd9.pdf
    • https://suvuzijovibalis.weebly.com/uploads/1/3/4/6/134660606/c82ba1ec5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/55d5aa55-5aef-4e48-b676-515507ba3e6c/natural_hazards_and_disasters_hyndman.pdf
    • https://uploads.strikinglycdn.com/files/631e9cfa-28f0-493d-b153-75c291dd5e3e/measuring_up_science_4th_grade_answers.pdf
    • https://s3.amazonaws.com/nopomewegobij/71436515338.pdf
    • https://s3.amazonaws.com/xuxifuzituwu/filukenabesavud.pdf
    • https://uploads.strikinglycdn.com/files/76ee0681-204f-470a-9904-c2d860ea4ad5/34434635322.pdf
    • https://s3.amazonaws.com/sajatesawodiji/dilapidation_report_template.pdf
    • https://static1.squarespace.com/static/5fc069c17d0c8f249d3e4d8d/t/5fc1b6519b1ed035381bddfb/1606530642751/what_is_a_digitizer_on_a_tablet.pdf
    • https://uploads.strikinglycdn.com/files/ab9207f4-e799-4620-9374-21e5837d5af8/zividogubuluti.pdf
    • https://static1.squarespace.com/static/5fde96712dcd53187f20392d/t/5fdfa862a3b92b153c3eb9d2/1608493154597/bidston_avenue_school_uniform.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da7c.bin
4b9dbaa02de7a7570fe5b8b3a8e0a8ae664423750758923221e4210f68f2cf3d
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7C 5436 bytes
font_01_sfnt_off0000ecf2.bin
3e0facfcb315e3f55da5485f43023f3bdde82900fac57406b6dd50555584b3c4
pdf-font-stream PDF embedded font (sfnt) at offset 0xECF2 11584 bytes