Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb2b853c7e28044…

MALICIOUS

PDF

92.1 KB Created: 2021-03-11 09:16:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11cc857a73dd81f17b31d595a17b2de7 SHA-1: 71795141d03f5bb1f9c6e4916deea232b2ece2e8 SHA-256: 0bb2b853c7e28044fe78f208543b9952963c874b950655bccd53bbc94c1e6034
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or SEO spam. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/123?utm_term=avery+template+5164+photoshop
    • https://bovuxubirike.weebly.com/uploads/1/3/0/7/130738735/9581935.pdf
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/magevejev.pdf
    • http://ita-bio.fun/483956323402b4xh.pdf
    • https://xevezuwojuko.weebly.com/uploads/1/3/0/7/130740392/83c9ab01.pdf
    • https://joxoxego.weebly.com/uploads/1/3/4/6/134664344/lafelekunadimasisew.pdf
    • https://wididalinur.weebly.com/uploads/1/3/3/9/133986726/5225507.pdf
    • http://tertov.xyz/sogikedofovumihnai.pdf
    • http://bikelumonekodex.mygamesonline.org/poxumemorimoref.pdf
    • http://prizinsta365.online/trane_psychrometric_chart_software_free0pw7v.pdf
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/386bf.pdf
    • http://mikazuxo.mypressonline.com/how_to_clean_black_and_decker_pivot_vacuum.pdf
    • http://mixit.info/emmys_winners_2019_hollywood_reporter8utiy.pdf
    • https://vawosikajoj.weebly.com/uploads/1/3/1/4/131438279/mirudadof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://roporuti.onlinewebshop.net/zakusipakezegade.pdf
    • https://uploads.strikinglycdn.com/files/0b955879-c4c4-4e7c-befd-a3997931ac3b/govaxa.pdf
    • https://uploads.strikinglycdn.com/files/8331a0c3-e99b-48dc-a0d9-009391f12e41/79712518459.pdf
    • https://uploads.strikinglycdn.com/files/02d3c1b6-7843-41c9-9b32-d912cbe300a5/wildgame_innovations_shadow_micro_cam_lightsout_review.pdf
    • https://s3.amazonaws.com/ginutu/searchview_example_in_android.pdf
    • https://uploads.strikinglycdn.com/files/0f51fc2b-4c0e-4e7e-b52a-c1bf9378ef7b/ergobaby_omni_360_review_singapore.pdf
    • https://uploads.strikinglycdn.com/files/dc0e7dc4-f1c0-4939-a123-8fa0e04121a2/fundamentals_of_physics_solutions_manual.pdf
    • https://s3.amazonaws.com/belopudevuzuza/90067931551.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013598.bin
57ac6984f63cb24be1b2daf6051084d593b4ac1a0c5ed41f223a805f1c8a89c3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13598 25832 bytes
font_00_sfnt_off0000fdaa.bin
40f16af53dbe57a525769b27163963450f2e736e788b5e9d9f5f3f1d5724cadf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAA 5628 bytes
font_01_sfnt_off000110c5.bin
7ae688466ec8a57c80b2371599cd1ed817b6c0f72afde480abafd32ade9382e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110C5 10688 bytes

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