Malicious PDF — malware analysis report

Static analysis result for SHA-256 b79155b87ea5674c…

MALICIOUS

PDF

86.3 KB Created: 2021-03-11 07:06:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f4ee715c9fc59ed71c4d4ef9079c68a3 SHA-1: 5ce0dd4790870749e663e48f60f9ae009399e448 SHA-256: b79155b87ea5674cca82617d99b30eb4d8548667f36db3d03d939251162479e9
156 Risk Score

Malware Insights

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

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 0.9997

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://pelibifir.ru/123?utm_term=android+tablet+with+gps+receiver PDF link annotation
    • http://pililiriniru.mypressonline.com/81451203649.pdfIn PDF document text
    • https://juwibaviwexufeb.weebly.com/uploads/1/3/0/7/130739975/towupujifaj.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/jahd6hh/fapenawopesunid.pdfIn PDF document text
    • http://didazema.mypressonline.com/flashback_x4_toneprints.pdfIn PDF document text
    • https://mujavipaw.weebly.com/uploads/1/3/0/8/130874121/nexuzedazukuj.pdfIn PDF document text
    • https://dapalijika.weebly.com/uploads/1/3/0/7/130738969/kuzaj-wuxara-zereforolekur-tiguma.pdfIn PDF document text
    • https://cdn.sqhk.co/rokogikapo/aqTgjjf/dnd_heroism_hit_points.pdfIn PDF document text
    • https://cdn.sqhk.co/sazalevimit/jhJTgf5/fuweloxuvulizejufilab.pdfIn PDF document text
    • https://biruvosuvibu.weebly.com/uploads/1/3/0/7/130739381/6c6b68622536f2.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/hg6ggBy/falobejarabubexasuzulo.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://s3.amazonaws.com/rurovikejigibu/how_do_you_transfer_a_house_title_after_death.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/box_and_whisker_plot_practice_worksheet_algebra_1.pdfIn PDF document text
    • https://d7179dab-c972-4501-9f4a-16044ca71e84.filesusr.com/ugd/434f74_af0a6f0f879e44d48e67fc12361014ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/netinuwa/88678735098.pdfIn PDF document text
    • http://degevojorak.myartsonline.com/70991974424.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/healthy_food_guide_october_2019.pdfIn PDF document text
    • http://nabulegewuwal.myartsonline.com/scag_wildcat_parts_list.pdfIn PDF document text
    • https://9df6e0af-a028-4e88-91ba-61a1b37318d5.filesusr.com/ugd/7c1f05_e9176bb37d86470dabe4dfedb09d475e.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AD 5404 bytes
SHA-256: d13a759d1091ad0ddab26b2271f0569384313f93ecb335593015dbdb775d6b6b
font_01_sfnt_off00011911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11911 10856 bytes
SHA-256: f21cdcd2d6f1af5b9af5a79f134fcec3e10142d79b384cbc90a4b953da1d7ed6
font_02_sfnt_off00013e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E28 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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