Malicious PDF — malware analysis report

Static analysis result for SHA-256 391fc451d2ecb842…

MALICIOUS

PDF

100.1 KB Created: 2021-03-05 07:27:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6bae2d82ed8d4da6364b6d3c90925ac5 SHA-1: 68b7b64434cf89bdf2bdadaf22fea09e5d5e91fc SHA-256: 391fc451d2ecb842a22be09d43a643de200726981d17e8359d3403899e6125ec
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bologen.ru/award?keyword=nordictrack+exp+1000+service+manual PDF link annotation
    • https://nufazuxumojo.weebly.com/uploads/1/3/2/8/132815750/c0fad7b.pdfIn PDF document text
    • https://wuzikixow.weebly.com/uploads/1/3/0/7/130775075/detuguzuzexal-wazaru.pdfIn PDF document text
    • https://jukaregexiw.weebly.com/uploads/1/3/2/8/132816195/lupavinire.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/stihl_weed_eater_fuel_type.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/caesalpinia_pulcherrimakkn9b.pdfIn PDF document text
    • https://tubuporupuruder.weebly.com/uploads/1/3/4/8/134879971/e3a03d8fd83c.pdfIn PDF document text
    • https://litodamun.weebly.com/uploads/1/3/4/7/134710511/xuwuxo-xarawiduma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/609c8f47-9118-46c4-90fb-0e84b5b7a48e/how_to_clean_hoover_elite_rewind_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0da6d6e-cbea-4287-b54c-13a0a3660bf7/zusanuvefupedomuwupatu.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/what_number_is_newsmax_on_dish_network.pdfIn PDF document text
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_e3baf68b49ba49c39b1134084d7804b8.pdf?index=trueIn PDF document text
    • http://nojikigor.myartsonline.com/37343215211.pdfIn PDF document text
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_f6b9ba51a5e748f195a8e67bd5b00688.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/641c8034-0c7d-4546-bcec-2d76239b5023/59666723765.pdfIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/mefoloj.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14397 5572 bytes
SHA-256: 9b96a7c499dac48e3ec52df927e9598c3b6eef6c2baa5574240a83a0361c0ccd
font_01_sfnt_off00015687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15687 14280 bytes
SHA-256: 4077bece49f7f6f0eb35964c3ec4abbb20d406cacabe586a79e451cb3302b12c

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