Malicious PDF — malware analysis report

Static analysis result for SHA-256 f215160fa7448775…

MALICIOUS

PDF

89.7 KB Created: 2021-05-20 12:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4c0b24475a33bc04577c8fc2249a305 SHA-1: b73918106ae768e76252b0db9c7df99aed7625c4 SHA-256: f215160fa744877562e4b804525650830e9663217a1ad5e6fb380d2250115192
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' point to a strategy of creating numerous seemingly legitimate documents to drive traffic to malicious sites.

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://pelibifir.ru/strik?utm_term=john+deere+gator+hpx+repair+manual
    • https://lugumeduzox.weebly.com/uploads/1/3/0/7/130740149/sibewamu-zajexe-gabuwovak.pdf
    • https://vafunaparixidi.weebly.com/uploads/1/3/4/6/134627598/fororazo_bowogaj.pdf
    • https://kojoridenifuzav.weebly.com/uploads/1/3/1/4/131406931/2445b450619b3b.pdf
    • https://regasefes.weebly.com/uploads/1/3/1/8/131871592/7326795.pdf
    • https://duwujesipegon.weebly.com/uploads/1/3/4/8/134883919/8aec4a3814c281.pdf
    • https://xugofijale.weebly.com/uploads/1/3/4/3/134314188/123d19fd.pdf
    • https://josazosanika.weebly.com/uploads/1/3/4/3/134339908/wolujobezu.pdf
    • https://xapofesifus.weebly.com/uploads/1/3/4/7/134749636/fikanodikerasu-kugupabipog-xosesa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/376e1be3-42f8-4344-a3a5-eea4bb6de289/why_is_the_book_called_seedfolks.pdf
    • https://s3.amazonaws.com/vikukinumet/gavawe.pdf
    • https://uploads.strikinglycdn.com/files/8b0164b8-25f9-48d6-945d-5847c1f692e9/how_do_you_reset_a_jam_bluetooth_speaker.pdf
    • https://uploads.strikinglycdn.com/files/2d97d403-7f56-4ca7-939c-eca305e3dd73/dibixudu.pdf
    • https://s3.amazonaws.com/tuxalowafokuvo/22047346040.pdf
    • https://uploads.strikinglycdn.com/files/6f9a3f44-14be-4ade-b89c-e35fc3c41bfa/how_long_do_pocket_juice_last.pdf
    • https://uploads.strikinglycdn.com/files/ac75f485-f1ff-442e-97ad-37afd1353e91/xejizezavefavideb.pdf
    • https://s3.amazonaws.com/xafaxotaful/libonegowatomukevowujesa.pdf
    • https://s3.amazonaws.com/dosalapasenow/odia_song_audio_song.pdf
    • https://s3.amazonaws.com/wavunot/zezut.pdf
    • https://uploads.strikinglycdn.com/files/12289b4a-f57e-493f-bbda-39e622cac6ee/how_to_treat_cat_wounds_uk.pdf
    • https://uploads.strikinglycdn.com/files/f0696830-3ca8-415b-b130-27db5bc50b55/troy_bilt_bronco_tiller_belt_diagram.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010538.bin
dade62170c453c46c514637f1f06821719b40e63541ea6a2a28eaa2692555763		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10538 5252 bytes
font_01_sfnt_off000116ed.bin
4a7876c0fd997ab850066101cd76f0cabad4f56edd04afab4e1afda314731df9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116ED 15300 bytes
font_02_sfnt_off000143fc.bin
560e11d5da3ed60647d844d0127c34f4fbbc0b68999cbe35161ddcd790341c9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143FC 16208 bytes

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