Malicious PDF — malware analysis report

Static analysis result for SHA-256 d79af1006d8590b0…

MALICIOUS

PDF

71.7 KB Created: 2021-03-17 22:13:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 947ac995b73aaeb887d94a64c2a69d29 SHA-1: 556f1635cea30240a88bfb176d444e4aec47b51f SHA-256: d79af1006d8590b0d004e40196d6d9df2cd1c0855b0a7a62c3f44092c416f1ef
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/123?utm_term=blendtec+fresh+blends+recipe+book+pdf PDF link annotation
    • https://reponobokuwe.weebly.com/uploads/1/3/5/4/135401207/poxon.pdfIn PDF document text
    • https://luzozesojuximu.weebly.com/uploads/1/3/5/3/135321468/zijudofibot-pabogutawu-ruzoxaxepibo-kofobof.pdfIn PDF document text
    • https://cdn.sqhk.co/riraxizilob/ghUc7hd/fugejupuzinurube.pdfIn PDF document text
    • https://pakajifovajopif.weebly.com/uploads/1/3/1/6/131607230/6546148.pdfIn PDF document text
    • https://fefokepixax.weebly.com/uploads/1/3/1/4/131452923/sesajonokawi.pdfIn PDF document text
    • https://sopetenoredu.weebly.com/uploads/1/3/5/3/135318191/4708853.pdfIn PDF document text
    • https://gofupadosu.weebly.com/uploads/1/3/4/8/134853885/fixesezo.pdfIn PDF document text
    • https://minomawisagu.weebly.com/uploads/1/3/5/9/135956859/6288901.pdfIn PDF document text
    • https://romarifekaxa.weebly.com/uploads/1/3/2/6/132683260/zewimog-zebojiriga-tijulo.pdfIn PDF document text
    • https://cdn.sqhk.co/matijamaj/SjfL7oo/64568068871.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9534cc33-30dc-483d-bed2-8d5691710d48.filesusr.com/ugd/3835dd_ee4608deb5e243a99442dd278694177b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fed1040-c6dd-4388-b53d-50f10e3ac5b5/why_is_pet_sematary_2019_rated_r.pdfIn PDF document text
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_738310678463422db7c0335e31645340.pdf?index=trueIn PDF document text
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_8abc4e7a192d45c3b34a4269fbedebc8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d16af08-672a-4084-aa21-61d821610e6a/i_want_to_learn_english_speaking_online_free_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4a8e3be-a6e6-4388-a55c-e73499426f9d/jack_lalanne_juicers_reviews.pdfIn PDF document text
    • http://punonawu.rf.gd/48098321923.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed1753d5-158b-401d-a60c-6e29c6a30b22/stihl_chainsaw_ms310_chain_size.pdfIn PDF document text
    • https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_02c1b78351c1438399b4366cfe5413de.pdf?index=trueIn PDF document text
    • http://ronojegev.rf.gd/cashflow_game_app_apk.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_off0000d88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88D 5288 bytes
SHA-256: e162ecc20315592b73b036f57a88d8df9dc480cb02dace4c7930fb00fa4f64c7
font_01_sfnt_off0000ea81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA81 10916 bytes
SHA-256: b0326d86406eebdea0ccbc6a92b344b70aa997e1e7363dfd611812727e72e736

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