Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e37c30dac746d6…

MALICIOUS

PDF

81.7 KB Created: 2021-03-16 10:52:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0101d72fab3b25adc01767594977c4f6 SHA-1: 6e5ccecd1ed742e0a66111fa0072cc6743c5d4bd SHA-256: e2e37c30dac746d6b13212443b51a152975c8a850119b807f9670c79b09bc4ce
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text fragments that appear to be part of a lure, specifically referencing a 'trophy guide'. No scripts were extracted, but the presence of malicious links is sufficient evidence for a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/123?utm_term=infamous+2+ps3+trophy+guide In PDF document text
    • http://jesurave.22web.org/72885614280.pdfIn PDF document text
    • http://kufowawixapiva.sportsontheweb.net/bula_celestamine_xarope.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409819/normal_5fd2ddfddc157.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_6025dc5189fa9.pdfIn PDF document text
    • http://nuzabokazovuwa.iblogger.org/fujiwipubigidekuxu.pdfIn PDF document text
    • http://sewukagazub.mypressonline.com/ryobi_bt3100_parts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367667/normal_600396bd474ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386613/normal_6024cc04c9e5c.pdfIn PDF document text
    • http://lonotel.mygamesonline.org/31409344902.pdfIn PDF document text
    • http://gadifurewurol.22web.org/xomarexutuginan.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/d420639b-d782-483e-b351-2f77b5dbf378/drinkwell_platinum_pet_fountain_cleaning.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/hp_officejet_pro_8600_not_printing_black.pdfIn PDF document text
    • http://fimuwudefixolet.epizy.com/minecraft_bedrock_pc_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc124396-1a64-4f00-9bb2-d773d2f4213a/what_does_mildly_abnormal_mole_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8e8cec4-90a9-42d1-8ee3-ba32853051e9/how_to_increase_brightness_in_casio_fx_991ms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99eba5bc-2f43-4bb8-aeeb-6497279cf794/2009_harley_davidson_sportster_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2b8f57d-64dd-4e82-9db2-a9f29bd4ec58/what_are_the_5_books_of_law_in_the_old_testament.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d1ab573-a2d9-4ca2-a8c9-ff424fdcc151/what_is_the_best_alexa_to_get.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/49219577402.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/dasujerugumaxivojepu.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/lijaruwebanomobubumazoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00710638-b0c1-4a00-a055-15dca7d5c12e/10048740451.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/dizijojakuxigivinuwalujiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25259c57-fe5f-4798-b7dc-284e1209a019/0_to_6_months_physical_development.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_off0001021d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021D 5760 bytes
SHA-256: 9ce74befc4c8faf9d88cb7325d8bed759b1ee2ad2a053244ea02422c8d50c880
font_01_sfnt_off0001159d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159D 10540 bytes
SHA-256: 67f192db55f416f8bea8dd6099fe566637e7cc8b902d840481da1efb5136f8f0