Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a560c81f893144…

MALICIOUS

PDF

89.0 KB Created: 2021-03-08 09:23:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5a7ec637370840bb50c0faf2c8150e0e SHA-1: c78e4040d1a25b654a84ea3673c91ef09dc4067c SHA-256: 29a560c81f893144ccc927acdd5d1cb7cc6e0e168d6ed6479c787e7199821ff2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://fokemale.ru/strik?utm_term=christmas+carol+movie+jim+carrey PDF link annotation
    • https://cdn.sqhk.co/dewufidabo/BFoZhaU/top_10_best_soccer_teams_in_south_africa.pdfIn PDF document text
    • http://hh666o.site/integrative_literature_review_definitionspdzd.pdfIn PDF document text
    • http://skidki-day.site/tururosekegubinunupepfwu7e.pdfIn PDF document text
    • https://cdn.sqhk.co/lakivasulis/jiifeif/87627549252.pdfIn PDF document text
    • http://instgramcopyrightdispute.com/what_is_pack_line_defenseqansj.pdfIn PDF document text
    • http://betmoy57.com/eaton_13_speed_transmission_fluid_capacitybfba0.pdfIn PDF document text
    • https://cdn.sqhk.co/jifibipex/dggewfV/28505500407.pdfIn PDF document text
    • http://brumbum2.xyz/51192174813lxl6u.pdfIn PDF document text
    • http://alexandreablog.com/informatica_etl_developer_tutorial2ndjd.pdfIn PDF document text
    • http://center-san.ru/eosinophilic_oesophagitis_nice_guidelinesjrvka.pdfIn PDF document text
    • http://vovpomnim.ru/doridugeit6b6.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/gYkwSha/10021540350.pdfIn PDF document text
    • http://ledy66.net/tarepefogotobaketosoneriylf6f.pdfIn PDF document text
    • http://badgesverified.com/zomap9bi7g.pdfIn PDF document text
    • http://luminar4-download.xyz/fokalijaruzavigua9glm.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/iDzwNhe/wafawerodek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e06e8306-d71e-4c92-aa1b-e8c52eeb44cb.filesusr.com/ugd/bc4951_5c613f330ab2467186c1e46518106c97.pdf?index=trueIn PDF document text
    • https://2c549fd3-bbcc-4e43-aea5-84609313cfd4.filesusr.com/ugd/c162b3_756983bb09ef4dd0adacb6498fa61ffd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/rigapapumegofegavasuf.pdfIn PDF document text
    • https://84bd2c60-91d0-47b6-9565-6ae8a6593e58.filesusr.com/ugd/963627_0323576e594c47138908c75582bc6f51.pdf?index=trueIn PDF document text
    • https://84d51d8d-5932-465a-b044-5d36dace581c.filesusr.com/ugd/98e2de_a23c7b3893014c3aac270d5ca2c7a1fb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/thermalito_afterbay_fishing_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/87676843169.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/advanced_rx_pa_form.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_off00011aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFF 5180 bytes
SHA-256: d8bf57bbe09a49ac39634962768adb7e63efe3248228015d1925ea8d8cfa88ed
font_01_sfnt_off00012c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C79 11992 bytes
SHA-256: bf6a3e707ab0a85c196240a2010b11c5a542352b7e17b50df6b2812708bf20d8

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