Malicious PDF — malware analysis report

Static analysis result for SHA-256 319cd2ad41e9e6bc…

MALICIOUS

PDF

74.4 KB Created: 2021-05-07 16:31:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc7600539f12921dbc8da2443aa32631 SHA-1: 79451379711eccec5f0f0780e31ea15926a35ef7 SHA-256: 319cd2ad41e9e6bc4c71464d25f9edeca3fb4f42862c9dda4a2a1deb52169f9b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, indicative of a link farm or phishing lure. ClamAV and ML classifiers identified this PDF as malicious, specifically flagging it as phishing or a trojan. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the intent is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=rabaey+digital+integrated+circuits+solution+pdf
    • https://rezigetofetima.weebly.com/uploads/1/3/1/1/131163738/6fa1af30993.pdf
    • https://ketesepirexutub.weebly.com/uploads/1/3/5/3/135306065/veguja.pdf
    • https://babaketejo.weebly.com/uploads/1/3/5/3/135304919/36f334.pdf
    • http://cosmostil.top/troy_bilt_weed_eater_carburetor_adjustmentjd21c.pdf
    • https://koduvorubosu.weebly.com/uploads/1/3/4/7/134719400/4840638.pdf
    • https://goxezojukaruvuk.weebly.com/uploads/1/3/4/0/134000107/3e8c120b.pdf
    • https://sexabadipeg.weebly.com/uploads/1/3/4/6/134684930/1283485.pdf
    • https://zaronubiguxade.weebly.com/uploads/1/3/4/6/134685024/donifuk.pdf
    • http://zabavnyi-slon.ru/m1083a1_technical_manualhwsrg.pdf
    • http://morj.space/lenovo_t430_laptop_specifications0uhqo.pdf
    • https://duxobibalarig.weebly.com/uploads/1/3/4/3/134360367/31740b.pdf
    • https://wagimudo.weebly.com/uploads/1/3/4/4/134475497/5534415.pdf
    • http://reduslim-shop.website/why_was_the_ruling_in_brown_v._board_of_education_so_importantg1klv.pdf
    • https://sizunevasiwi.weebly.com/uploads/1/3/5/3/135310428/9234989.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ddbcd52e-64c5-4c25-90f5-21f5b45abcd8/contax_t2_camera.pdf
    • https://uploads.strikinglycdn.com/files/e86727cb-9ce3-4469-820a-1047a87a7a0c/32826163945.pdf
    • https://uploads.strikinglycdn.com/files/9f7c55f7-3ca9-4f81-b808-9b71cf9c7c04/69523731142.pdf
    • https://uploads.strikinglycdn.com/files/c7c118be-3790-4831-a0c2-34414ac5c397/33629061762.pdf
    • https://uploads.strikinglycdn.com/files/0816c552-27e3-498a-b15c-3b0ae81c04ef/72350421058.pdf
    • https://s3.amazonaws.com/werowibovezoje/adobe_flash_player_for_chrome_windows_10.pdf
    • https://uploads.strikinglycdn.com/files/1cd02781-30d3-40cc-8ca8-c0cfeb958540/drz400_service_intervals.pdf
    • https://s3.amazonaws.com/feliso/does_a_heavier_recoil_spring_reduce_recoil.pdf
    • https://uploads.strikinglycdn.com/files/eed8e013-de8c-4ecd-a11d-9bdffe5e67fc/wunibovukakibotiz.pdf
    • https://s3.amazonaws.com/bejikefowu/pusawibuxifazebifutosobu.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_off0000e3d0.bin
c4a3c713502e658ae56f0a5545ff5e6b68e740e4dc2a8f5b8bd02643850c85aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D0 5572 bytes
font_01_sfnt_off0000f6dc.bin
1797250985fe4f62a386f1736680d3817d07df884c81e23932dacd519ff50d0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DC 10732 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.