Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f6695502a122dd0…

MALICIOUS

PDF

81.3 KB Created: 2021-06-08 08:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f36b3d85a4d7c6fd4b2bbf69c4080c81 SHA-1: 8cf43ffb4e10df0281377efd179b70403da8e83e SHA-256: 6f6695502a122dd03afee6b9890936ac13da96290e5b7cba34fa04f5c55e0bc8
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, many pointing to disposable hosting services, suggesting an attempt to drive traffic to potentially malicious or scam-related websites. The document's content, disguised as organic chemistry nomenclature examples, is a lure to encourage users to click on these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://laborke.ru/pbw?utm_term=ejemplos+de+nomenclatura+de+quimica+organica PDF link annotation
    • https://gatobutapasi.weebly.com/uploads/1/3/4/3/134364099/26604a741.pdfIn PDF document text
    • https://nakosedamewa.weebly.com/uploads/1/3/4/6/134612328/9b17e.pdfIn PDF document text
    • https://vedixoba.weebly.com/uploads/1/3/4/8/134864822/6625783.pdfIn PDF document text
    • https://goromezamoko.weebly.com/uploads/1/3/4/7/134753948/6879055.pdfIn PDF document text
    • https://gedevuxezupimot.weebly.com/uploads/1/3/4/8/134884710/kepumikajadix.pdfIn PDF document text
    • https://xudagemiribu.weebly.com/uploads/1/3/1/3/131378943/8235357.pdfIn PDF document text
    • https://xatuguje.weebly.com/uploads/1/3/1/8/131856293/malituto-sosifogoxu-koruba.pdfIn PDF document text
    • https://kevavabine.weebly.com/uploads/1/3/1/4/131406582/1516397.pdfIn PDF document text
    • https://jodewiveso.weebly.com/uploads/1/3/0/8/130873916/2973913.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3ffbfcc-3631-47f7-ae01-b1916c7d083a/16868095782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9a84c34-76c1-4ac5-88c3-6abd5896bc4b/xolonanoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8baa40e-1520-4ab4-8632-ca75db933302/dakuda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15805d4a-35d5-4a31-b3a5-0c6c38ed8e99/38304672096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a64f085-bf5c-4d69-8426-a687c05e8de8/74546390609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07fbf354-92a4-4dde-9e3e-38f9c8a5cf05/59968577804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce237ac8-4947-4c3a-abc5-c1c28c71fb38/samsung_galaxy_note_4_price_in_kenya_2018.pdfIn PDF document text
    • http://xanovobuxebo.pbworks.com/f/how_to_get_logic_pro_x_free_trial.pdfIn PDF document text
    • http://degenazi.pbworks.com/w/file/fetch/144661269/19202816025.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3cfc42a-f5b8-41e8-81d8-99824bd41cf9/love_is_a_fallacy_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/047c6b1d-ce5d-4483-a5fb-f02257cd58aa/who_wears_a_gimp_mask.pdfIn PDF document text
    • http://xojifot.pbworks.com/w/file/fetch/144411429/cost_to_polish_an_airstream.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3389c481-b7d9-4591-baba-7a6f78e8d2db/7407540647.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_off0000dfe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE1 5552 bytes
SHA-256: fe9d085db482047823a2ae67be5945fbbf945ae1840f466339bd6de84e2fe864
font_01_sfnt_off0000f29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29E 1924 bytes
SHA-256: 52d5b22f059bc71754638b8cb8f8e80867975da2cf155c5bbc1c1ac96d257222
font_02_sfnt_off0000fbec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEC 11760 bytes
SHA-256: 6843f3f150659850a0c3b277a62b1c7b0fec2040305d76d303d3a6c7cd7a2a28
font_03_sfnt_off00012253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12253 16036 bytes
SHA-256: 149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1

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