Malicious PDF — malware analysis report

Static analysis result for SHA-256 e82b561fc7df1164…

MALICIOUS

PDF

84.7 KB Created: 2021-03-07 00:19:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 31fcd00c334e256fcbe1a28979d369c1 SHA-1: 99aa342f520dc6e5396168e4624fd1847fde500d SHA-256: e82b561fc7df1164b2eb173cc0f618d4f238edcd8b0b8f20c343fa20313953a6
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users to potentially harmful websites. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure itself is leveraged to host numerous URLs, indicating a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://botokaw.ru/123?utm_term=dialectic+of+enlightenment+the+culture+industry+enlightenment+as+mass+deception PDF link annotation
    • http://lofajemami.sportsontheweb.net/gupisunoxajajulod.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/icvEfih/too_many_birds_callahan_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/2rcgXxj/sunegovefalupusi.pdfIn PDF document text
    • https://fisupipegapug.weebly.com/uploads/1/3/4/5/134515512/gopotowovuka-jowofud-kifojanera-zelokidifara.pdfIn PDF document text
    • http://miromawetibikew.mywebcommunity.org/troubleshoot_avanti_mini_fridge.pdfIn PDF document text
    • http://nuvagefo.medianewsonline.com/90277998213.pdfIn PDF document text
    • http://kuzexamipapoxip.medianewsonline.com/war_of_the_worlds_2019_tripod_sound.pdfIn PDF document text
    • https://zokevuwokonumez.weebly.com/uploads/1/3/4/6/134682223/61f282a9c831eb.pdfIn PDF document text
    • http://viwavidif.getenjoyment.net/wixakuta.pdfIn PDF document text
    • https://cdn.sqhk.co/nixagigad/HAljg7W/tip_tap_room_yelp.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/ehmHiiL/taotao_4fun_150cc_go_kart_parts.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/is_there_a_live_chat_for_facebook_help.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/tipikaxe/lelumo.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/how_do_i_reset_my_logitech_k270_keyboard.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/bethesda_store_reporter.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/68811625325.pdfIn PDF document text
    • http://nebojemesiwi.atwebpages.com/96155343684.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/draft_beer_list_template.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/4834411116.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_off00010d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D25 5672 bytes
SHA-256: 128154b9cea825d7c69b6c9bdd762c094aac65e8e04c67db63c8ca6a946aa4cf
font_01_sfnt_off00012054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12054 10816 bytes
SHA-256: f03c1600e9bd6069a2d47c55900822da9c59d08f412ab7c117ee8e8aaf229c5d

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