Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ffcf98a80f6e2c…

MALICIOUS

PDF

68.2 KB Created: 2021-02-18 03:39:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2fecd3041d81865045540baa6d074c97 SHA-1: b0790a167dd489c461050b977304ade808d659f6 SHA-256: c6ffcf98a80f6e2c7d32a3f673685d4da3fb0d51192e4777c6d6f8f356762eb6
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains, indicating a link farm or SEO spamming operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=biointeractive+answer+key+the+biology+of+skin+color PDF link annotation
    • http://nuveclovet.xyz/wadevonixidorusetugorupeozw2y.pdfIn PDF document text
    • https://cdn.sqhk.co/lebereme/hgdjjic/mejazegajimitadaviwatu.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/ihgehcd/download_car_simulator_veneno_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/norumuwapa/rgdgeja/classic_bubble_shooter_game_download.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/abc_bible_verses_for_preschoolerskffpa.pdfIn PDF document text
    • https://xidoteruredogon.weebly.com/uploads/1/3/1/4/131454367/kamedulunowinil.pdfIn PDF document text
    • http://reassurez-moi-fr.info/avaya_announcement_audio_formathnp1p.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/gjdhihe/clock_spider_size.pdfIn PDF document text
    • http://edarudost.online/xixoxiwaxolulokirawuvuta09sfo.pdfIn PDF document text
    • http://covidcapsule.world/macbeth_act_1_quiz_study_guidet8k9o.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/hZqijTu/lego_dots_pineapple_pencil_holder_amazon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/definition_of_bacilliform.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/13384585161.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/1470352242.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/venice_tourist_attractions_map.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_off0000ce9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE9E 5648 bytes
SHA-256: b90555a2b4f214598b12efa1f37661271ce5c3d4619ed4b38ac71aa94d23e72e
font_01_sfnt_off0000e1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F5 9940 bytes
SHA-256: b06bf4927dc98214e12f0069e2afe2667c08c53db6c5b48faebc66345e7a9969

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