Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f9fa8ad9dc06877…

MALICIOUS

PDF

80.4 KB Created: 2021-03-23 10:10:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a710d909d80ec62da4b94056d15821e8 SHA-1: 20d2a7af749b527065d0aba2e6276504cba885d5 SHA-256: 1f9fa8ad9dc068778aa0b3edfd238cc04291f6885c799fc129a7fb2c5b9b421c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics and a machine learning classifier, indicating a phishing or malware distribution attempt. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains metadata related to its creation as a PDF, and the presence of external URIs and a link farm strongly suggests it is used to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://baarspo.ru/strik?utm_term=bodyweight+training+plan+pdf PDF link annotation
    • http://mapotilij.mygamesonline.org/18255086817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_602c2c703c036.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416939/normal_60436b360cc2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409246/normal_5feb4e04db10e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369317/normal_5fde2849554de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403140/normal_6014926925d15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459477/normal_60072a9332520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454290/normal_5fd27f40f32c9.pdfIn PDF document text
    • https://cdn.sqhk.co/melalisopapu/5Tji5ol/roforarozisimifimop.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/SicQggi/coupons_for_family_dollar_smart_coupon_phone_number.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383132/normal_604d3441507ed.pdfIn PDF document text
    • https://cdn.sqhk.co/rufomezin/ieFFiaB/71244164768.pdfIn PDF document text
    • https://cdn.sqhk.co/sejukuxa/zghwpgf/xofidenejadogukategitep.pdfIn PDF document text
    • http://fumuroruzej.medianewsonline.com/best_safety_rated_booster_seats_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/mudebijutene/avLMkhb/celestia_ludenberg_execution_name.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376359/normal_604aad1be8cd9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_bc3e7ae1e8f7480fb0b2b75c8e9750eb.pdf?index=trueIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_a277c2093a9643e29aad1ad657a56870.pdf?index=trueIn PDF document text
    • https://08b4a39d-fa16-4eaa-91be-ae90003cacb9.filesusr.com/ugd/237bf7_ebbdf69ad7ee462ba100ff4adf4abe2c.pdf?index=trueIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_72590e95dccd47098e6b1bbd7d76fd0e.pdf?index=trueIn PDF document text
    • http://fedonefekipide.myartsonline.com/why_does_my_tankless_water_heater_beep.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/small_business_planner.pdfIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_ee8120e398794966b409e1c0b186a3fb.pdf?index=trueIn PDF document text
    • https://d4996ccb-aecf-47c4-aab6-3c4fe022e1b7.filesusr.com/ugd/b7ed05_4b74c28ca1fa4a5c837be9b7ca4f99b4.pdf?index=trueIn PDF document text
    • http://rurebafib.onlinewebshop.net/gulemujenanurifabadopudeg.pdfIn PDF document text
    • https://c5c1e25b-3ca9-4f8f-aecb-0ee3b29cb37b.filesusr.com/ugd/f4fe7b_98613a75ab4b41f49af120f1e4779c1a.pdf?index=trueIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_57e7327cb0b14aa1a09a23bb3f50f4e4.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD47 5368 bytes
SHA-256: 805e59c16bb48487c03d5ba82c451a63e2f9f85f557b565e74150d17d634567d
font_01_sfnt_off00010fa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA4 10664 bytes
SHA-256: d768e7dfc00630a60a1615880bf7206fa5ab9b239da66dd0b90f0e21a99fe900

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