Malicious PDF — malware analysis report

Static analysis result for SHA-256 097b10529bb6f0d1…

MALICIOUS

PDF

88.1 KB Created: 2021-06-01 05:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5f48a6999f8ee95be37993c1e5c9f820 SHA-1: 2e7251aea936ff14cb80196bcdaa7679ef225e56 SHA-256: 097b10529bb6f0d112112f5221199014e0d6b65e93c70d9617425b7d72e75c12
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://jumiwimov.ru/123?utm_term=bestiariusz+warhammer+pdf PDF link annotation
    • https://suzagadagaxu.weebly.com/uploads/1/3/0/7/130775939/risaxuxoragixe.pdfIn PDF document text
    • https://tovadifu.weebly.com/uploads/1/3/4/0/134096489/6625278.pdfIn PDF document text
    • https://xukaxibuban.weebly.com/uploads/1/3/4/7/134701669/tanuwojibutize.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465006/normal_5fdaaec230e6c.pdfIn PDF document text
    • https://fisudobu.weebly.com/uploads/1/3/0/8/130813554/1426707.pdfIn PDF document text
    • https://revapukas.weebly.com/uploads/1/3/5/3/135323612/vutewamamabama.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451368/normal_60119c373f173.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446027/normal_60322f50d4d35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428052/normal_605a9edd99f5e.pdfIn PDF document text
    • https://dodilepu.weebly.com/uploads/1/3/4/4/134444379/2402203.pdfIn PDF document text
    • https://bevaxudemu.weebly.com/uploads/1/3/4/3/134318806/8638460.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454052/normal_604ef4dcd13f2.pdfIn PDF document text
    • https://manadazalivufud.weebly.com/uploads/1/3/4/3/134358645/resawilopog.pdfIn PDF document text
    • https://bafokaxaxex.weebly.com/uploads/1/3/4/8/134881351/vifuzi_jawokevadapo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417429/normal_6035ffa470bd1.pdfIn PDF document text
    • https://midezotadodagof.weebly.com/uploads/1/3/5/3/135326840/tonajufowikij_girapul_fuwob_tovivunidusujix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501206/normal_6062f33acb843.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412909/normal_603c7ab0ba476.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sejuworepow.pbworks.com/f/prentice_hall_mathematics_geometry_book_answers.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/f/how_to_find_the_median_of_grouped_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcf99f57-36d7-4be6-9ed5-bc9dad8e33b1/vunisikugutevevikoj.pdfIn PDF document text
    • http://fulusivijomu.pbworks.com/w/file/fetch/144440709/advanced_pharmacognosy_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3c53a8d-567b-48b0-8618-24d8b235db24/why_is_my_bluetooth_mouse_not_connecting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b2b70bf-00fa-4099-815a-fb9748abd29d/32077055935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4100ab63-bf07-4c47-88ed-1b59a4dcf9a2/briggs_and_stratton_repairs_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/268ab8bf-31db-4cf9-8e88-9416afcca01d/collar_x_malice_common_route_bad_end.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_off00011935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11935 5440 bytes
SHA-256: cced67408fd77ce559951d8084100ba66327f385e66274567d9c90cd43bf361f
font_01_sfnt_off00012ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA9 12776 bytes
SHA-256: 9392081874d5e5aec193e6657e2b3f384ab2bc02ef04dc3b53cacf23b4d4ac5d

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