Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ec7bc8cb245d102…

MALICIOUS

PDF

63.9 KB Created: 2021-04-08 23:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 41e953d12e0f2b25cab82c3a213e8858 SHA-1: b087c9b7077a4909d1689542ec11bb29ebc4a66c SHA-256: 6ec7bc8cb245d102881c63e3ddd650e1fcbf490955409e3859bbec29f3ba7278
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 0.9998

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://gimoguvi.ru/strik?utm_term=convert+pcf+to+kn%252Fm3 PDF link annotation
    • https://lewovabarififu.weebly.com/uploads/1/3/1/4/131453312/vuvuxiva_neniweluwavati.pdfIn PDF document text
    • http://lightstart.xyz/shirley_jackson_the_lotteryhdttj.pdfIn PDF document text
    • http://wisopenudaris.22web.org/blue_jackets_lines_with_laine.pdfIn PDF document text
    • https://pedigibija.weebly.com/uploads/1/3/1/8/131857049/galijifizowif.pdfIn PDF document text
    • http://nelibagaxo.iblogger.org/what_is_an_edenpure_heater.pdfIn PDF document text
    • https://nulowuze.weebly.com/uploads/1/3/4/6/134614321/2727450.pdfIn PDF document text
    • http://sowadegepixu.22web.org/85829622335.pdfIn PDF document text
    • http://vinnipoh.fun/saint_saens_cavatine_tromboneffb2e.pdfIn PDF document text
    • https://dawikuwavuvuka.weebly.com/uploads/1/3/4/8/134866752/gaduzi.pdfIn PDF document text
    • http://wetomesidis.22web.org/what_is_the_shortcut_for_split_screen_on_laptop.pdfIn PDF document text
    • https://mobuverafawez.weebly.com/uploads/1/3/5/3/135346795/7127400.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/6d3c85b1-d3a7-4bbc-b264-63a10fe81c71/faruriga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6ed546f-3f31-4ea8-88d7-23bb6261f852/55464457399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4e8e32a-7327-4c87-8831-2da22934904d/lg_lp0815wnr_not_cooling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/327f4d35-3130-4588-8103-534004688133/58332951783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1fd48e5-9c30-4043-ab77-7608dc54252d/tetidibowupaze.pdfIn PDF document text
    • http://genurenifu.rf.gd/23728370690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8843fb82-d3da-4fcf-bd2d-34c3f76089c3/d_and_d_building_fabric.pdfIn PDF document text
    • http://mijekobafenado.rf.gd/sateduzujivedakegajevoku.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_off0000bffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFFE 4972 bytes
SHA-256: cfea84a1db1aa67d282d4aaf4f1e9c6773b6a80c72373db7811cb9715fccf4c8
font_01_sfnt_off0000d0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F4 9892 bytes
SHA-256: e273e5e77ac074dd328dbd849725a652e89c09f52a9f26dc464fbb8922a7d263

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