Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed1d22d6227c8aa4…

MALICIOUS

PDF

77.5 KB Created: 2021-04-25 12:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f87be74d259fe06125676121b2d38e9a SHA-1: 519779d743cca680f56e3b9c22bda3158e2fc03f SHA-256: ed1d22d6227c8aa423cc64ec1e46360f91f7811721db1f02eff58538b71b29ce
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of a large number of external links, including a suspicious URL to 'golowaki.ru', suggests the document is part of a link farm or phishing campaign. While no scripts were directly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect users to malicious sites or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/strik?utm_term=hp+6700+premium+ink+system+failure PDF link annotation
    • https://cdn.sqhk.co/delotijuw/VMGYie4/snowden_movie_theater.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/IjdEii8/marketing_definition_factors_of_production.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/QhdHJhb/coc_magic_clash_of_clans_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/nqih5V5/lost_temple_of_dirthamen_map.pdfIn PDF document text
    • https://cdn.sqhk.co/derilunadine/k1fcQmo/xodaluwoxaxaxumot.pdfIn PDF document text
    • https://cdn.sqhk.co/bidekidarub/hiiDghT/grandparents_in_spanish.pdfIn PDF document text
    • https://cdn.sqhk.co/kubasovusi/yyij1W5/favored_soul_nwn2_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/rasetiwulipu/jXthbxi/65081317372.pdfIn PDF document text
    • https://cdn.sqhk.co/tavanaru/MggiipN/swot_format_excel.pdfIn PDF document text
    • https://cdn.sqhk.co/marezotije/9IeBPja/dismounting_masters_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wetoxojixan/jghqiaW/flat_pack_cabinets_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f3b055c-7415-4f78-8987-03a48b9e57ae/where_to_buy_mens_intimate_apparel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de9680fe-f796-4bda-a6d4-e917fedbc630/fefesawogifakin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f9e9407-5b0a-4423-936f-281040e786ab/roman_breviary_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/971af7eb-01cb-4b9d-84d6-d5489c76a7cd/how_to_connect_bluetooth_speaker_to_computer_monitor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8599a770-673f-4ea3-8105-2a5f6b5809cc/egyptian_hieroglyphics_alphabet_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63ea0b66-582d-4f59-9d4e-cef6df851d67/ellipsis_pause_for_effect.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16b7ff68-fe74-466d-a799-4e22c55541ed/holt_handbook_fifth_course_chapter_3_answer_key.pdfIn PDF document text
    • https://27420876-d215-4860-9a72-f48db0d0c320.filesusr.com/ugd/4062c2_69f73680406045b58319804d89e04c3b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0483545-4006-42e9-9719-358679147870/26157055260.pdfIn PDF document text
    • https://76a725e8-946c-4ae9-9249-cda469d35108.filesusr.com/ugd/83c8cc_ba097ab6c67540559f7113255583262e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3253f77e-49a2-48e7-bf9d-f485d6e25668/66740655517.pdfIn PDF document text
    • https://04934832-22f3-474e-96de-b9d593e92251.filesusr.com/ugd/f390e7_e95d136d44014fd686e6c3c8ab8f260d.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CA 5552 bytes
SHA-256: 8129924a08c8e961f7f24c93a8882b30a6a169af7fbd5e60467274843435efa3
font_01_sfnt_off000103a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A6 10676 bytes
SHA-256: a75e8b449f4f5804f15cb5af6bf9bc5ad8dfe3ab09fcd488f8813b5f37678552