Malicious PDF — malware analysis report

Static analysis result for SHA-256 10351499df449978…

MALICIOUS

PDF

79.0 KB Created: 2021-05-03 09:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 58f08a7fe7a76832a5f25e0f975fe9ae SHA-1: 2c2174d56e1c4fc52e91d0240572120e274b3939 SHA-256: 10351499df449978f9cbd62f87069fe3a66976f3c57d559d8ba281fa1c56f427
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external links, a common tactic for phishing or SEO spam. One prominent link, 'https://xezojetit.ru/strik?utm_term=use+multimeter+to+test+car+battery+charger', appears to be the primary lure, disguised as a search result.

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://xezojetit.ru/strik?utm_term=use+multimeter+to+test+car+battery+charger PDF link annotation
    • http://logmeinnow.xyz/abecedario_3d_para_imprimirua6mf.pdfIn PDF document text
    • http://reassurez-moi-fr.info/baby_girl_white_shoes_size_5tgdgn.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/zategafozasiru/black_and_white_hexagon_sheet_vinyl.pdfIn PDF document text
    • https://f2203da8-4034-475c-a980-a37079f2cd7f.filesusr.com/ugd/d29026_a27f6d58ef534c6d87b5da6a3e91af75.pdf?index=trueIn PDF document text
    • https://2e96d104-cacc-4af9-914c-411927af6089.filesusr.com/ugd/0f866b_494ba4ab188345ff8717a844650d4d36.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mokixetat/mebipip.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/what_are_visual_aesthetics.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/vilevokubutogilufe.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/arsene_lupin_1932.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/pirivoxizebafi.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/colgate_palmolive_pakistan_limited_annual_report_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/el_talmud_que_es_y_origen.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/hypertension_treatment_guidelines_for_elderly.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/blank_map_of_the_world_with_countries_names.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/catching_fire_book_review.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/gazalagetazunetigozexuwuw.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/art_history_professor_jobs_nyc.pdfIn PDF document text
    • https://02687da8-bf2b-436b-a8ca-82c6e04513a5.filesusr.com/ugd/e48f8a_efd3129148f34f1bb1ced852c8e97614.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mosezavor/23420953028.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/99909345240.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/git_cheat_sheet.pdfIn PDF document text
    • https://7211abc3-b26e-437e-abd8-8a8c7ebd4af5.filesusr.com/ugd/0683fb_40e98f8d178f47829323dad83bcfc826.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luropiw/suveloxuva.pdfIn PDF document text
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_4a6253750a0f48009f5fe521b56abfe4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bofake/how_many_questions_are_on_the_pals_exam.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_off0000f62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62C 5448 bytes
SHA-256: 4e44b4b476079668af63eb35e281566f56b40f286e22804309c549c5160041c2
font_01_sfnt_off00010890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10890 11080 bytes
SHA-256: a83905f0b349edf70dc170e8389563c49cd1f85ed31341e8c87b915bed8cba73

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