Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeeae4ddca6096a2…

MALICIOUS

PDF

102.3 KB Created: 2021-03-16 01:03:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ec5a64679e24f9655c333ad5c2255412 SHA-1: 63269611c7bfa40b85224e92d5d104c25a5ce1bc SHA-256: aeeae4ddca6096a2c46a63dc1cc00a03b6e3d331baae5d7a24152e58684c570f
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and external links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://kuzutuzo.ru/123?utm_term=idle+miner+tycoon+manager+guide PDF link annotation
    • http://daating19.site/sovameminoxujejoneqgvdd.pdfIn PDF document text
    • http://intekzafast.online/warhammer_aos_path_to_glorya05zs.pdfIn PDF document text
    • http://islandlandscapesbb.com/25749825534i69eh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490125/normal_60197a369c7af.pdfIn PDF document text
    • http://frasqen.online/77288622835tflv9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485810/normal_60095b60b76e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471945/normal_6048020513576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490920/normal_60488a5589652.pdfIn PDF document text
    • http://brumbum2.xyz/phd_thesis_acknowledgement_samplewa2py.pdfIn PDF document text
    • http://temppicture.xyz/how_to_program_clicker_garage_openeraddle.pdfIn PDF document text
    • http://itawegan.space/hernia_inguinal_pediatria_medigraphic0qgbt.pdfIn PDF document text
    • http://yogait.space/hyundai_sonata_hybrid_review_2020afg0y.pdfIn PDF document text
    • http://simcars.ru/20935582062r7tua.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/filidabut/49969778413.pdfIn PDF document text
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_09b672e30ae84f658b4e7d48abfc123d.pdf?index=trueIn PDF document text
    • https://c18d9829-3add-4afa-bc87-35007fe3998a.filesusr.com/ugd/70c1ec_be9e69d79fea4e2bb8ae80ec2378dad3.pdf?index=trueIn PDF document text
    • https://b5d51143-f34a-4a4f-9265-6917490cb775.filesusr.com/ugd/9f69bd_f7ce9d9e8a954e179dbbb905f2aa9f64.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bagokiko/akilandakodi_brahmanda_nayagan_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/26168881559.pdfIn PDF document text
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_fad1470fc21446a6a36965225c1183bc.pdf?index=trueIn PDF document text
    • https://27420876-d215-4860-9a72-f48db0d0c320.filesusr.com/ugd/4062c2_c271033602aa4836b84795df33da1aa5.pdf?index=trueIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_e35a9b606a9d44a1b7e5547516f35a88.pdf?index=trueIn PDF document text
    • https://f4e740b0-69d0-4d5c-a0c7-362dc6b2ad6d.filesusr.com/ugd/0356fc_f3b64391e25148bdab8fdb48df82c414.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/95834221634.pdfIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_5942873a8ccc4b89959d84bee2be2ab7.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E8F 5120 bytes
SHA-256: 7173296d9e2dbac80384146be35e2ea4b1a7e84e56fc7b5ea7018c6b8fc43b54
font_01_sfnt_off00014fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FEE 11176 bytes
SHA-256: b5671584e83fc8a7d108192f7ceb1208cee0bfe7a3b58d5b8ef698b29ea6e0e9
font_02_sfnt_off00017633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17633 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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