Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6d5faca566619a…

MALICIOUS

PDF

81.3 KB Created: 2021-03-04 19:34:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 58afa05b014f642ccb87f371e2a0782d SHA-1: d1dd297ba6846175aa7d71da7add657a0f7d93d6 SHA-256: 0a6d5faca566619a0426526d2764e0b0b1a0cb3ea4921a96d1db569a715f7d32
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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://druttle.ru/award?keyword=what+is+the+meaning+of+apple+tree+in+dream PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412378/normal_6005fc6c47367.pdfIn PDF document text
    • http://fbcopyright-center.com/73464219305stke3.pdfIn PDF document text
    • http://nanolenka.xyz/25824386215mddtr.pdfIn PDF document text
    • http://tihefers.online/dlink_dsl_2680_wifi_not_workingvde7y.pdfIn PDF document text
    • http://xizuwekimexuwag.22web.org/what_is_meant_by_data_pointer_in_microcontroller.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420764/normal_5ff9ddd747227.pdfIn PDF document text
    • http://bedomukuruxe.22web.org/sonemowuxafuzigerawameso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405179/normal_60404ea772d40.pdfIn PDF document text
    • http://kind-insta.site/febakeziwasepazopdwri.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/conversations_with_god_movie_quotes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410013/normal_600cf26f74cd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408475/normal_600716961629f.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/53011762109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421462/normal_6040e9eea4dd5.pdfIn PDF document text
    • http://watogoda.mypressonline.com/hill_rom_900_bed_price.pdfIn PDF document text
    • http://zitalogeloluwiw.mygamesonline.org/what_is_mind_control_called.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451752/normal_5ffa9a78982d8.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/is_food_web_and_food_chain_the_same_thing.pdfIn PDF document text
    • http://ruwufuwetoj.mygamesonline.org/rotifonowuvekazukef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruvibume.rf.gd/bisarujopuzuzelekuja.pdfIn PDF document text
    • http://favukimasinete.rf.gd/combining_like_terms_puzzle_worksheet.pdfIn PDF document text
    • http://kipejefanowisu.atwebpages.com/trigonometric_identities_for_class_10.pdfIn PDF document text
    • http://vusomon.epizy.com/how_to_play_spades_card_game_2_players.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_off000100c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C2 5468 bytes
SHA-256: 9519418b16e54e472f34b22f443d2b3bca51a05d276931667d391655e369e20c
font_01_sfnt_off0001133e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133E 10592 bytes
SHA-256: 31e238556ab95392d885cdc979ab8b5501afe47916b85c565231cfd2ac12bf6d

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