Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c59c80f33825eed…

MALICIOUS

PDF

73.1 KB Created: 2021-03-30 22:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6d4b912cf5efdc0130c5357d34f6cb6e SHA-1: 8fccaecffd4e8247043a4b36f5c1fc2dbdfbb55c SHA-256: 3c59c80f33825eed3344f6a99305f51d2411f9a11444f5ed9a57264802d78c60
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The embedded content, though heavily obfuscated, appears to be a lure for 'strike force cheats iphone'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/wix?keyword=strike+force+cheats+iphone PDF link annotation
    • https://vuwuzujos.weebly.com/uploads/1/3/2/7/132712237/9a70cb055.pdfIn PDF document text
    • http://game-pro.xyz/balancing_equations_and_simple_stoichiometry5i0f3.pdfIn PDF document text
    • https://fagutefoxod.weebly.com/uploads/1/3/4/2/134235025/mujiwumuvubawifewegi.pdfIn PDF document text
    • https://patobusogeziwe.weebly.com/uploads/1/3/4/0/134096506/xapimod.pdfIn PDF document text
    • https://fofapisobav.weebly.com/uploads/1/3/4/7/134712410/2147420.pdfIn PDF document text
    • http://fortysgjdk.fun/rozonv3xef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370273/normal_5febf3b96aaed.pdfIn PDF document text
    • https://begagezegitajaj.weebly.com/uploads/1/3/1/3/131398046/mariwowedeguzidajena.pdfIn PDF document text
    • http://kvyovk.xyz/block_puzzle_game_uptodown1oxnx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420244/normal_5fc9a207a3f5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445864/normal_60302c120e3be.pdfIn PDF document text
    • http://prosale.company/45181053726ry0u9.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/ec1c58a0-e3e8-4382-ac62-e14b4ac883b6/58173100707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/990b5b23-a236-4cbf-adbe-94aabe41ebb0/what_is_the_best_diet_for_young_athletes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b69e153-eb4a-4750-a425-3551864ff7bb/how_to_start_a_high_school_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d597834-5480-43ee-8370-e6a93720270a/fumopufetijusiw.pdfIn PDF document text
    • https://c81c1a69-aec6-471c-ac34-7a6800eafc69.filesusr.com/ugd/9ef1ea_5871beceb60146b5bb69cf0a3c7d9207.pdf?index=trueIn PDF document text
    • https://7737876a-f762-42ef-af6f-18b78abacabf.filesusr.com/ugd/9066bd_58cc2b1e9ed94030ac4b729ef32c704b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb316211-a1a3-471c-9148-9b8be2468236/propaganda_edward_bernays_turkce.pdfIn PDF document text
    • https://677f84e8-2a3b-482a-8721-58d714100356.filesusr.com/ugd/086aec_e670865fe7f64408be7b720bc0d556fe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb305324-2f82-4743-8639-842362b65b5c/netgear_prosafe_gs108pe_default_login.pdfIn PDF document text
    • https://1eb42bdc-3da6-4b32-b75f-4382f1721f8e.filesusr.com/ugd/35474d_5c35442d4f06406f81c5b1d2879c96dd.pdf?index=trueIn PDF document text
    • https://47ab6ce1-aee6-4086-a8e7-31fe393d2411.filesusr.com/ugd/afbef4_06f38e6124ba47f4b623b9cdda356abe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc49468d-4712-4203-ab28-03a7b37d69c7/5000_year_leap_free.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_off0000df1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1A 5240 bytes
SHA-256: 2377d761a5bed1ebf4cbf42567ac8f5f5ba941b760d2c183a3f7d6cdb99c330b
font_01_sfnt_off0000f0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EE 11120 bytes
SHA-256: f89f5fc62f355ca57c7cd720429900f6fc8e6ed35e5d4efa1c9aa8cf5e630e9b