Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2d05f27d87c919…

MALICIOUS

PDF

77.2 KB Created: 2021-06-05 09:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d00e57dd471fc6e26736a34ae89e7dd7 SHA-1: a55e51c869bd0a2981bb36972aaab4ac14d3a50e SHA-256: 2a2d05f27d87c919844e5c481856aed420768da2a692d6544c5de431e92fad00
164 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which appear to be part of a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document's primary purpose is to redirect users to external sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/pbw?utm_term=how+to+read+korean+books+on+kindle
    • https://static.s123-cdn-static.com/uploads/4426418/normal_5fc86635eb973.pdf
    • https://wivopapam.weebly.com/uploads/1/3/6/0/136082265/wogupezutudalo-litopubot-gekari-sawupukab.pdf
    • https://cdn-cms.f-static.net/uploads/4401723/normal_6016a6cc3c088.pdf
    • https://mubasaji.weebly.com/uploads/1/3/4/8/134846322/a8174b1ef0aa0.pdf
    • https://danulezide.weebly.com/uploads/1/3/4/6/134601395/5535945.pdf
    • https://lenukadizavubo.weebly.com/uploads/1/3/4/4/134492519/turepuki-zamuvonomaboziv-tevujevadubuneg.pdf
    • https://bepixumute.weebly.com/uploads/1/3/5/3/135302933/8f707e660.pdf
    • https://cdn-cms.f-static.net/uploads/4453888/normal_601f0f7412847.pdf
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5fe95e11f1dff.pdf
    • https://karaxofuko.weebly.com/uploads/1/3/5/3/135344752/mivut-puzokunaze-rinenonirewob-bukuf.pdf
    • https://nowitijot.weebly.com/uploads/1/3/4/7/134716658/difulojanevaju_zutepuwaju_manuzutadeso_voxoxuxasakabax.pdf
    • https://cdn-cms.f-static.net/uploads/4496616/normal_60689027bf063.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/01970260-8701-41f6-bf5f-22e81343ceb6/overstreet_comic_book_price_guide_2019.pdf
    • https://uploads.strikinglycdn.com/files/9cf3f830-9f04-4cd9-b771-6b6c63cc2f97/2020_ford_mustang_gt_convertible_california_special.pdf
    • https://uploads.strikinglycdn.com/files/e4a6def3-4946-44ec-8e7b-cfbf1f2e2493/madame_butterfly_summary_tagalog.pdf
    • https://uploads.strikinglycdn.com/files/ded16964-29f3-4308-b68b-0c309b5bd8b6/20005391254.pdf
    • https://uploads.strikinglycdn.com/files/c52639c2-fb1b-4e62-a3fd-2799cb8a3913/swarm_trap_plans_australia.pdf
    • https://uploads.strikinglycdn.com/files/11ef95de-b9f7-4fce-88ee-874bd492b7a2/bufozigenoj.pdf
    • https://uploads.strikinglycdn.com/files/a30e6ad5-4b84-4e08-b48e-d4498e8c61b3/what_does_e01_and_f09_mean_on_a_maytag_washer.pdf
    • https://uploads.strikinglycdn.com/files/1e5be5fb-6408-4aaa-aef4-75e44c1035db/merubixojewol.pdf
    • https://uploads.strikinglycdn.com/files/b760c3ef-c3ff-4355-bb77-475fa03eeee5/juwezojikofixepanijolifof.pdf
    • https://uploads.strikinglycdn.com/files/2da9c3ea-3944-4b86-938d-93a1a7a37e88/panasonic_blu_ray_dmp-bdt220_owners_manual.pdf
    • https://uploads.strikinglycdn.com/files/2c82458f-b220-4b4f-aa1a-10356ed6aa87/sizejek.pdf
    • https://uploads.strikinglycdn.com/files/a778e4b0-1ee7-41c2-abe8-54c7fe98706a/2004_mercedes_e320_brake_service_reset.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_off0000f036.bin
13f1b5d4a83388ec6f87cb08adc39e47bf2fd1b07f45a70a07097302f54ef6fd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF036 5076 bytes
font_01_sfnt_off00010190.bin
2788189f925aa84f04c6eadb42d18c64fbc1f1c025297145351249fdf4e38590
pdf-font-stream PDF embedded font (sfnt) at offset 0x10190 11008 bytes