Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ec7c515c76a181…

MALICIOUS

PDF

79.6 KB Created: 2020-12-30 01:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 25de75799429461c023895d9b83f5be6 SHA-1: 98ba3a83c40bee5fae17fe262453d2341ed1fe14 SHA-256: 60ec7c515c76a1814e745aca4ceb068c0953216b7df90d4a8673de6f54c72852
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a link farm for SEO manipulation or traffic redirection. The presence of a link to 'traffine.ru' with a search term related to a free PDF download further supports this. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/123?utm_term=diversity+consciousness+4th+edition+pdf+free+download In PDF document text
    • https://beserozufem.weebly.com/uploads/1/3/4/8/134864657/565293.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/mekupikoje-wizidi.pdfIn PDF document text
    • https://fozuwopakinijur.weebly.com/uploads/1/3/4/6/134617915/wiberop.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/vamukudajexibiw_dizigoza.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/bagubofuvezin.pdfIn PDF document text
    • https://mufuxavezefajox.weebly.com/uploads/1/3/4/4/134497947/mesumuzaja.pdfIn PDF document text
    • https://tawedituja.weebly.com/uploads/1/3/4/8/134864040/21b3af1a8abc.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://uploads.strikinglycdn.com/files/f9a6d34c-753b-41ff-9ac7-3916a3ae6dc1/oliver_the_virtual_cat_hack_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c85c899-b292-490e-9758-004607f2cf2d/child_maintenance_agreement_contract.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/356d353d-507b-43a1-9be0-ad9c22b0d0a8/tiny_dice_dungeon_heroes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76b3b3ec-34eb-4489-887c-07f65e3dbfe2/12811036768.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/kansas_city_news_reporter_salary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24f68133-fb30-487e-b41f-a4f0b0b7773f/vekavafalor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3911bc64-8824-46dd-a5a3-d1ea6c2c48c9/ionic_compounds_containing_transition_metals_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fa6fe33-73b0-480b-9bc1-bf45d9cc59e4/dark_moon_goddess_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86a34e31-953d-423c-8ea6-e954b506a0f5/things_that_rhyme_with_orange.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD231 5468 bytes
SHA-256: 340c4b7200f1fb84866a91732f2c517f3b6a87ac2171818ca3ba8c221e6a58c7
font_01_sfnt_off0000e4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E4 11308 bytes
SHA-256: f6e47ddf42e0618fd7c8bcf6c8718a4455dc076f89b8c7867da710776dbb43d1
font_02_sfnt_off00010bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBE 16060 bytes
SHA-256: eb67323a3edc51f073cf7ae7c668a4400309481d93a41d1ca3bfc03d889966df
font_03_sfnt_off00012058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12058 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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