Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a028f6420fdf4c…

MALICIOUS

PDF

83.0 KB Created: 2021-04-06 19:34:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b5d629e67b5d0f35e4ce3e96c4bd2160 SHA-1: 2e117d5b41f70f07b250604f2570560eba510b79 SHA-256: c2a028f6420fdf4ca33972e1818c530e6e1c4b93e603e39acfefa4b1654955dc
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, with one pointing to 'https://botokaw.ru/award?keyword=makro+catalogue+july+2020+pdf'. This indicates a likely phishing or scam attempt, leveraging a deceptive document title to encourage clicks on potentially harmful URLs.

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://botokaw.ru/award?keyword=makro+catalogue+july+2020+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490739/normal_5ffab381d12ca.pdfIn PDF document text
    • https://cdn.sqhk.co/geruxibab/tjjhewq/24095949022.pdfIn PDF document text
    • https://cdn.sqhk.co/robimovule/gzICixg/synthesia_latest_version_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/heVagcK/animal_camp_healing_resort.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/jahciht/catching_basketballs_free_basketball_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374189/normal_5fce976cce941.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373755/normal_5fcdb0ac3ea6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375196/normal_604f5feb59a03.pdfIn PDF document text
    • https://cdn.sqhk.co/popuzanuguw/dOjjjOV/atomistique_1re_anne_medecine.pdfIn PDF document text
    • https://cdn.sqhk.co/jututumogu/fidgdjf/luzonutev.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/jewizopukuni/sex_offender_search_ohio_by_zip_code.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/nogad.pdfIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_6979fac9b2b44b9b9f31905d988edc4b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zafirawit/lunefukeboxale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03a65376-1970-46d6-a9f3-e89acb727b04/warrior_diet_fast_food.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a49e1273-e34d-4d02-9274-0160e42a375e/bubitilixoni.pdfIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_d68c45fb02764397a164e482322243b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/falufusu/the_half_has_never_been_told.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_off0001012a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012A 5664 bytes
SHA-256: bb816fceb49f7cad5698097fc778be3b58c8abf30242b0023afe41c03460d549
font_01_sfnt_off000114a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A6 12556 bytes
SHA-256: bbd399099646c22cb4c9b20f12298bc1df0f6bf98896880419a4e89e6e189b2d

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