Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eebfbbb338112c5…

MALICIOUS

PDF

74.2 KB Created: 2021-03-07 23:06:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bb30babe6b88c1f1d439bf6fd27743d4 SHA-1: 6d4b563a6158a692ecd290b903619f15608f93b2 SHA-256: 7eebfbbb338112c56891ebb25a9041a0bb8128ec13bcbc4318453e35123f0dc9
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The PDF contains a large number of external links, suggesting a link farm or redirection mechanism. The primary URL identified is 'https://pelibifir.ru/strik', which is likely used to direct users to malicious content or phishing sites. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=are+sonic+breakfast+burritos+good PDF link annotation
    • https://sefariduzaki.weebly.com/uploads/1/3/4/6/134665623/846a9578ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392659/normal_6042e132e6d95.pdfIn PDF document text
    • https://cdn.sqhk.co/tarozawowe/mhjZEgf/cake_baking_courses_for_beginners_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370077/normal_5fd7d42127d79.pdfIn PDF document text
    • https://leduzurukidep.weebly.com/uploads/1/3/4/8/134858842/gogabamitajegiwu.pdfIn PDF document text
    • https://todatotosikuped.weebly.com/uploads/1/3/0/7/130740429/8427092.pdfIn PDF document text
    • https://cdn.sqhk.co/firijanab/jgjc5Qr/gipelunexuvizu.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/b44cc.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/inq3gfi/puppy_dog_pals_balloons_party_city.pdfIn PDF document text
    • https://xowitato.weebly.com/uploads/1/3/0/7/130776358/6175577.pdfIn PDF document text
    • https://sofifego.weebly.com/uploads/1/3/4/8/134899758/vulotowenomof.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/matogapibelifiv/episode_guide_supernatural_season_14.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e3dc7ed-23d6-495b-a373-03c33c1612cb/golf_buddy_wtx_gps_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07367db3-fa64-4832-9b87-43e4f275392c/how_to_start_your_own_video_production_company.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/therefore_put_on_the_full_armor_of_god_kjv.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/tallentex_2019_answer_key_mumbai.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/15313239474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/befedc85-8c4c-4de6-8a64-6226b5131756/how_to_change_network_security_key_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d463cddd-78a8-4e7a-84b8-18e2b189a730/rhonda_byrne_the_secret_book_review.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_off0000e408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE408 5348 bytes
SHA-256: 1b36d1ad220db34c1fad3ad97f1182d14fdb1ea1b4882f3bd748bc2488fb8741
font_01_sfnt_off0000f64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64C 10992 bytes
SHA-256: 086f4104965d6e58708367242ebb5c61b6b9f9227821bafa8c95339db44aee4d

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