Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b57d65325170cb8…

MALICIOUS

PDF

91.1 KB Created: 2021-04-15 05:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0a8116b6455ab847371592cc94e39038 SHA-1: 635d60391f81eb93acc22ba8c07147b2a9766a33 SHA-256: 3b57d65325170cb81b9c5fdb3e17d09e1bbfd0914ce3e0057acca1c683700d4a
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external URLs, many of which are hosted on disposable domains. The primary lure appears to be content related to 'body language with pictures and meanings', as indicated by the embedded URL. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through the linked resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://gimoguvi.ru/strik?utm_term=body+language+with+pictures+and+meanings PDF link annotation
    • https://cdn.sqhk.co/vufisolepu/7jjijjx/66319446744.pdfIn PDF document text
    • http://boxijogirexu.medianewsonline.com/34949011800.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/40Y4OrJ/40809577576.pdfIn PDF document text
    • http://zuzatew.medianewsonline.com/80531181760.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/ifAEXjf/86102495877.pdfIn PDF document text
    • http://dexiwakuxabef.medianewsonline.com/building_materials_and_construction_vtu_notes.pdfIn PDF document text
    • https://litisenos.weebly.com/uploads/1/3/1/0/131071047/6212298.pdfIn PDF document text
    • https://cdn.sqhk.co/dakagugi/rZ1hjif/i_am_monster_idle_destruction_mod_apk.pdfIn PDF document text
    • https://bobovisosusare.weebly.com/uploads/1/3/5/3/135394734/xusowumunedotiwu.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/bureau_of_civil_aviation_security.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
    • http://pizuzol.onlinewebshop.net/pekubizizavos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecba3989-4d18-4578-a7aa-0f56a7569cde/rulixafugaz.pdfIn PDF document text
    • https://0e733887-fd72-4d21-8b10-0a39cafbc931.filesusr.com/ugd/1e4d10_001d6fb1613b44f2a6cfb53d49f2fcc9.pdf?index=trueIn PDF document text
    • https://80ce5912-1c67-4773-adf4-abf614566e91.filesusr.com/ugd/acb48a_74cff68ae62f4226a6cf812f901577d7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/adc63a69-2814-46f7-811e-e8cc45afd640/french_verb_conjugation_avoir_passe_compose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/943b6387-4aba-4590-b80e-1469b68e1756/how_many_questions_are_on_the_ny_cdl_permit_test.pdfIn PDF document text
    • https://874c0fd6-92eb-497b-905f-dc7ca4d2e287.filesusr.com/ugd/5ca7d4_6f81c6d050e645b6ad7a649c44c80901.pdf?index=trueIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_c1d3e15c9e54410f8bb66cf1230dd53d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7dc7724-a90b-4377-878b-deddda37f9e2/the_gospel_of_wealth_by_andrew_carnegie.pdfIn PDF document text
    • https://fe2b84af-b373-48e0-a714-f820169e3fe9.filesusr.com/ugd/ed1d2e_f678e12cac7d43faba19f6ffc2ba0a98.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f675ee5a-b553-40ff-8332-202a11337939/does_dell_latitude_e5500_have_a_camera.pdfIn PDF document text
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_6ee0e8a2eba642fe97c9b86a8e11efa1.pdf?index=trueIn PDF document text
    • https://8e6fe9cb-6e01-49b8-a8bf-add1d7538daa.filesusr.com/ugd/4e948c_6884c30002144f439a22ae43efd7334a.pdf?index=trueIn PDF document text
    • https://926fca10-1439-4adc-b819-38dad5327275.filesusr.com/ugd/26d6d3_7020fdd8d5a641f89861a32cb837e324.pdf?index=trueIn PDF document text
    • https://63a0a607-6d1b-4b95-a813-f1b07cabc719.filesusr.com/ugd/ad56f2_1e661d17a1934aa88227f7fa4a323cc7.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11779 5612 bytes
SHA-256: ccae50d4d6ff929116064c6810a2700c1bcd43f4754a88599bdbb2a1c848650d
font_01_sfnt_off00012a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A76 10668 bytes
SHA-256: aa1b7917bf74831af1ab2ba5f64a3ec91ab7c3544bcb9aed8e716f633093a8d3
font_02_sfnt_off00014eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EEB 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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