Malicious PDF — malware analysis report

Static analysis result for SHA-256 158484d5d46716b8…

MALICIOUS

PDF

86.7 KB Created: 2021-04-07 22:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 779924673d1c3495183e33f5f0e346b3 SHA-1: 83e8024364cf6927564dfa10d3d3acfb469ae2be SHA-256: 158484d5d46716b844b84996e71a6a6a05dc1dc0cf37746feccdfe10af267516
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 6

  • 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.
  • 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://xezojetit.ru/strik?utm_term=scrum+the+art+of+doing+twice+the+work+in+half+the+time+pdf+github PDF link annotation
    • https://sakolepak.weebly.com/uploads/1/3/4/5/134588428/vowivo.pdfIn PDF document text
    • http://gladkoe-telo.xyz/learning_french_books_free9aoys.pdfIn PDF document text
    • http://abistrans.ru/is_padi_open_water_worth_itohfmo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479718/normal_5fdaab57dc4c5.pdfIn PDF document text
    • https://zosafetudosejo.weebly.com/uploads/1/3/4/6/134670517/09077c9.pdfIn PDF document text
    • https://vemujevamari.weebly.com/uploads/1/3/1/4/131452814/6868095.pdfIn PDF document text
    • https://wagalivo.weebly.com/uploads/1/3/0/8/130814328/6712133.pdfIn PDF document text
    • http://gufutaca5.xyz/fallout_3_hack_terminal_console_command7ah4t.pdfIn PDF document text
    • https://saxukenewu.weebly.com/uploads/1/3/4/6/134649668/7912466.pdfIn PDF document text
    • https://disadaniti.weebly.com/uploads/1/3/4/4/134463451/bazaje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486042/normal_60555df72d505.pdfIn PDF document text
    • http://idealicaitalia-ufficiale.site/what_kind_of_dog_is_falkor4f2ti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://78ff948a-0765-49f5-a22c-0fbe0eba7848.filesusr.com/ugd/888d0b_32e56c2ab61344d3af6539319f348e49.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ea1e216-aeb6-43db-bbac-0f61550e64df/sp_racing_f3_flight_controller_pinout.pdfIn PDF document text
    • https://29ca30ec-7ad4-487f-8637-d2d67f3a323c.filesusr.com/ugd/10b11f_7e1f9c7554234258aae8862f65f00530.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/42a4334f-35f9-4611-9794-611b3f793596/pozep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/190b4dd5-428b-4507-b2fc-8aef2ad4d0d0/pepemabevidu.pdfIn PDF document text
    • https://2a26c5f8-c4f8-4af8-830b-7e2c9961bd8e.filesusr.com/ugd/2e4362_422444c7b1534fd0a7aea2b41acb1cfe.pdf?index=trueIn PDF document text
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_5fecb882e70a450b95cd62a564506eca.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa778114-e44e-457b-87ac-7f4609f9367d/33200332821.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/032393ed-04d3-4dde-a422-5442982bf2e1/anker_folio_keyboard_case_for_ipad_air_2.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_off00011196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11196 5788 bytes
SHA-256: 4030a2c806e277f1604e1176c43d29f36df1351e6625e026b6aab0c5e2e220b2
font_01_sfnt_off0001252e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252E 11716 bytes
SHA-256: 760434e7a725746daef3c7b100a1de1b34e74eb2aab6f3ee5de6aa53bb65c400

Open this report in the interactive analyzer, or submit your own file for analysis.