Malicious PDF — malware analysis report

Static analysis result for SHA-256 90c8a2a891e277da…

MALICIOUS

PDF

102.5 KB Created: 2021-03-16 06:48:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b5ff0a60f93981059c54653dc399880d SHA-1: 2462b57f1acb43936d5490b714b4950e963cae69 SHA-256: 90c8a2a891e277daae6056bcae56412a8cf0035729dcf592f721304099ed77ec
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a PDF SEO link farm. One prominent URL, 'https://zajinet.ru/strik?utm_term=lord+of+the+rings+trilogy+extended+edition+blu+ray', suggests a phishing or malicious redirection attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, but the overall structure and link farm behavior indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://zajinet.ru/strik?utm_term=lord+of+the+rings+trilogy+extended+edition+blu+ray PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382412/normal_602735ad38d02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_60489ae7b8ea1.pdfIn PDF document text
    • http://iglivesupportteam.com/the_crown_season_1_episode_8_musics8ybw.pdfIn PDF document text
    • http://cleanup-sale.site/how_to_write_a_topic_sentence_grade_4kkv37.pdfIn PDF document text
    • https://cdn.sqhk.co/nowegizin/ifjjghG/ancuta_anghel_album_fisierul_meu.pdfIn PDF document text
    • https://cdn.sqhk.co/xavexapoxiv/aZvgehi/crowd_card_meaning.pdfIn PDF document text
    • http://websecurer.tech/jugafumofopesuginumiwmeyh3.pdfIn PDF document text
    • http://copyrighthelpptteam.com/43030720468yodz.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzowadijavu/0fjjZjb/colors_coloring_book_paw_patrol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414848/normal_5fc7d40d72ea1.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/jcz0hck/here_wego_offline_maps_gps_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zobazulibes/Hjjifia/33821586333.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kefefetafij/barcode_scanner_android_camera_encountered_a_problem.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/what_are_the_primary_benefits_from_investing_in_income_property.pdfIn PDF document text
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_0c4e0da9fadd456a9ed18ed5d83fe8ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/sadlier_oxford_algebra_1_practice_book_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/avd_manager._exe.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/composite_materials_in_aerospace_industry.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/lejejezugugoforubimuwutu.pdfIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_cb2cec46345245c4bde1dff788be23dd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tarajix/brute_22_190cc_self-propelled_lawn_mower_parts.pdfIn PDF document text
    • https://6bfd3344-23d3-4e03-ab7d-00c1c23eecf6.filesusr.com/ugd/be19e1_ff6350a5900042269f4cb20b57afa13f.pdf?index=trueIn PDF document text
    • https://c2c662fa-00ac-4c69-bf5d-04da7d6c99e2.filesusr.com/ugd/9b33c5_93f79108876f4477bcef9e0e21be438f.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14509 5304 bytes
SHA-256: 588c94504f56021cbc247abc3ad22d65247e0f962b3fc0739de963d743156f6d
font_01_sfnt_off00015716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15716 11024 bytes
SHA-256: 26dd3015594230586c76c2733bf48a298cc58e60568a7e79cf3c247e0a694c02
font_02_sfnt_off00017c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C00 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c