Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd63380ee5fa99b3…

MALICIOUS

PDF

79.1 KB Created: 2021-04-03 18:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6aaf189372da6f58bbcc3e5e32e88c42 SHA-1: c77781c4cb249364f30deb0a3f5ff8435eaa8140 SHA-256: bd63380ee5fa99b3df1a760a7534f4bab8c81337dfeb83bde18f6d95b552de2a
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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://jottigo.ru/123?utm_term=sap+business+one+blueprint+template PDF link annotation
    • https://cdn.sqhk.co/sudofeno/giehfgc/xewidoned.pdfIn PDF document text
    • https://cdn.sqhk.co/xomakonezema/boujc2h/3063763050.pdfIn PDF document text
    • https://cdn.sqhk.co/zenujulikik/jigfkgj/wastickerapps_cartoon_stickers.pdfIn PDF document text
    • https://garanokuwepo.weebly.com/uploads/1/3/0/8/130874617/99d5b09b4.pdfIn PDF document text
    • https://cdn.sqhk.co/fomezawelud/lie6Uif/33236605549.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/gijfLKg/35131418622.pdfIn PDF document text
    • https://cdn.sqhk.co/lexelinowe/igijjdP/linda_brown_interactive_story_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/mitejapeki/jKwBhgi/black_friday_2019_iphone_deals_target.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/hgdGij8/83965600579.pdfIn PDF document text
    • https://cdn.sqhk.co/pugipepa/eWjfS2P/minecraft_3ds_on_2ds_xl.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Goge6ib/lean_bulk_workout_plan.pdfIn PDF document text
    • https://dodarumobite.weebly.com/uploads/1/3/1/4/131437296/sobis.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/wutezigojuxi/inconvenient_truth_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/what_do_you_understand_by_the_model_of_community_development_elaborate_with_examples.pdfIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_e48da6bf405145ab87497caccb6ffbf6.pdf?index=trueIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_405666088dfb4226824ac5ce887d29ce.pdf?index=trueIn PDF document text
    • https://2acf176d-1645-44e4-83be-c67f7ac9af6b.filesusr.com/ugd/e72dd6_cc4fc5f93d9f4f8493add863681da38b.pdf?index=trueIn PDF document text
    • https://ec451167-49e0-489e-a150-d7dc0ecf9264.filesusr.com/ugd/fe0276_62abaa005d5b4b18bcdb937e847d24e6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/patilawasu/burris_eliminator_2_review.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/diablo_3_leveling_guide_barbarian.pdfIn PDF document text
    • https://1b65b899-5fad-42bd-af9e-a3fb1d6a4c80.filesusr.com/ugd/a2ebd8_734ed12c17964f1385a8e8b767cb2e02.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wofaxil/54650151066.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_off0000f60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60A 5208 bytes
SHA-256: e19753f42193e201fcd3f1d8cce648c6c26fe7309c94211f2c7d6f6078e58cf3
font_01_sfnt_off0001079e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079E 11444 bytes
SHA-256: 3fd729d272bc9aa04142b73cdc377be034cf1336b3de410ae81bcd0aa3de2c3a