Malicious PDF — malware analysis report

Static analysis result for SHA-256 8035ed8a5d2f09c0…

MALICIOUS

PDF

90.8 KB Created: 2021-04-15 10:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 575fc9bfdf8d7acb729934bc2ffdcd0e SHA-1: e84ecad47eacbac9c54fdfd5caf97f13e9df36da SHA-256: 8035ed8a5d2f09c0cd62e8ffec1e57be75b890dd1a756394dfdf9fbbbbd390c6
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, flagged as a 'PDF_SEO_LINK_FARM', suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure indicate a likely attempt to redirect users to malicious content, potentially for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=john+naka+bonsai+technique+vol.1+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387037/normal_604823d5bf500.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377931/normal_6005f52380c8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489979/normal_5fd1744c8ccc7.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
    • https://6680615c-3592-42a6-94f3-b98e474b5330.filesusr.com/ugd/252546_63432c11a41c4c2797cd7a5c1a3d9179.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/star_trek_discovery_season_1_episode_5_imdb.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/67713198148.pdfIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_ef0516406e89402faf5544487d3906dd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/falevi/52626888885.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/kusowekasuzefepujipenara.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/what_is_federalism_ap_gov.pdfIn PDF document text
    • https://d64d5b41-a66a-4b78-b87f-0feaf8e9cf76.filesusr.com/ugd/cf1aed_81ca3d4d8c714146ac22ebb807ec2764.pdf?index=trueIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_e7f0aa20e4914e40a53fc77f7100bc0c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/how_much_money_does_charli_damelio_earn_from_tiktok.pdfIn PDF document text
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_c3f83244b56f4e51854ff84a11731dda.pdf?index=trueIn PDF document text
    • https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_d54de0600dde47f29c245e26c740a8dc.pdf?index=trueIn PDF document text
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_d7e365538f77429fab62e25182d16072.pdf?index=trueIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_84665c9a4ed04244a3e564595dbec787.pdf?index=trueIn PDF document text
    • https://84bd2c60-91d0-47b6-9565-6ae8a6593e58.filesusr.com/ugd/963627_8be760757b4a432ca95c8b96c2d21cd2.pdf?index=trueIn PDF document text
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_bd6bdf67372d4aa29480a9974ca24138.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/rubber_asphalt_deformation.pdfIn PDF document text
    • https://a4067306-84c0-45ce-9c36-3cbb795fcb37.filesusr.com/ugd/d5b970_02d0880f8db944b18b689bc4f0332395.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fexuror/79326007608.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/arithmetic_sequences_word_problems_with_answers.pdfIn PDF document text
    • https://c4e42e93-254c-4ba8-b495-737f84002742.filesusr.com/ugd/ddb60a_1384668de7cf4d9eb4c411b799842571.pdf?index=trueIn PDF document text
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_28ef19252f784d749e2cdd06ebb15945.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/46202427670.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001143c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1143C 5492 bytes
SHA-256: 444b4d88390b79bc9fecdca02b5ab556e2ceba9e3ab96fbe2f113459cd29efcc
font_01_sfnt_off000126f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F0 11804 bytes
SHA-256: 3b53246f2675d222426d91a12118a7a299067aa2ba1f17c9668f86ac2c1f7857
font_02_sfnt_off00014ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EE0 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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