Malicious PDF — malware analysis report

Static analysis result for SHA-256 27fccf2855dac6d1…

MALICIOUS

PDF

72.1 KB Created: 2021-01-11 14:39:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 29a04b0e1adf814c43814a2f0738833f SHA-1: 717019ad8af34a1f3a79345280be88289c6c1f4f SHA-256: 27fccf2855dac6d19d884578d990a4bc1adf9987b3b55a4f49a44c874269b4a4
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

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 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://trafftec.ru/123?utm_term=apa+citation+for+desk+reference+to+the+diagnostic+criteria+from+dsm-5 PDF link annotation
    • https://site-1168401.mozfiles.com/files/1168401/repost_for_instagram_plus_app_store.pdfIn PDF document text
    • https://site-1195638.mozfiles.com/files/1195638/wechat_pay_logo_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/nebuneduzib/RMT1O5z/bow_kingdom_come.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5f886d54c98c0.pdfIn PDF document text
    • https://site-1178336.mozfiles.com/files/1178336/newspaper_advertising_agency_near_me.pdfIn PDF document text
    • https://xivapumi.weebly.com/uploads/1/3/1/6/131606059/beborosazikenevod.pdfIn PDF document text
    • https://cdn.sqhk.co/povewepalu/jfBK76g/13628218095.pdfIn PDF document text
    • https://site-1179199.mozfiles.com/files/1179199/65876660321.pdfIn PDF document text
    • https://site-1178547.mozfiles.com/files/1178547/bc_hockey_roster_2013.pdfIn PDF document text
    • https://site-1168413.mozfiles.com/files/1168413/advertising_campaign_examples_ppt.pdfIn PDF document text
    • https://site-1178703.mozfiles.com/files/1178703/labyrinthine_righting_reflex_means.pdfIn PDF document text
    • https://rarikomedos.weebly.com/uploads/1/3/4/6/134616559/zudivuxutivexixisuv.pdfIn PDF document text
    • https://vebifejelib.weebly.com/uploads/1/3/0/7/130775119/ff301bd0e95f3.pdfIn PDF document text
    • https://site-1166610.mozfiles.com/files/1166610/56594854745.pdfIn PDF document text
    • https://site-1167963.mozfiles.com/files/1167963/burger_king_menu_deals_5_for_4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379231/normal_5fb2528173cd1.pdfIn PDF document text
    • https://debemalimuwu.weebly.com/uploads/1/3/4/3/134385929/kigivu.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
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE37 5532 bytes
SHA-256: a612daa362b157c2ceeead506989b31d95581605e3371935246cf108efc655c3
font_01_sfnt_off0000e0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DD 10464 bytes
SHA-256: e26f782f23ebd50d7e19b105668bca3a64d174d306838ffbd37c2bc69aff3e77
font_02_sfnt_off00010491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10491 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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