Malicious PDF — malware analysis report

Static analysis result for SHA-256 768eb20475d99499…

MALICIOUS

PDF

88.8 KB Created: 2021-03-18 23:53:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 78a187ba3bfaa515247dc44a431ca2f1 SHA-1: 9196a2d562e9b27655ecc44c2e88bcd4ed2d02a7 SHA-256: 768eb20475d99499e0ffb10cd8ede8069d5961652181fa06c831c98c48a29c9b
156 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 0.9989

Heuristics 5

  • 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.
  • 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=brother+p-touch+h100r+manual PDF link annotation
    • https://cdn.sqhk.co/jivonotiso/heqhaid/rinidanivetu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378857/normal_5fe54f3bd5918.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527859/normal_5ff038d2c11bb.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/MrhhYN6/lisig.pdfIn PDF document text
    • https://cdn.sqhk.co/sivumazudi/tjahajg/2020_nfl_football_schedule.pdfIn PDF document text
    • https://cdn.sqhk.co/mizipudi/Y4OUYge/nfl_espn_news_and_rumors.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421218/normal_60337f1326898.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383131/normal_5ff3bba8dd559.pdfIn PDF document text
    • http://wugupomovupa.sportsontheweb.net/20289403589.pdfIn PDF document text
    • https://cdn.sqhk.co/venifirub/fGhfiaU/sort_balls_3d_free_puzzle_games.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/fowunaxizanemejev.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/jodagabimulo.pdfIn PDF document text
    • https://87da31d5-d184-45e7-a456-0ad082c8bd65.filesusr.com/ugd/55e94a_d28986dba2594611a6d5ebc75fc834c2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/63965572256.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/sony_str-k502p_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/92456770082.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/sobuwolopapab.pdfIn PDF document text
    • https://065b66ee-25d8-4381-b309-094abc4d823c.filesusr.com/ugd/2703e6_d420a9b1cfc640f9ac5f97035f20a7c7.pdf?index=trueIn PDF document text
    • https://8ed7ad90-0d0e-491f-9c15-1f6cd5a61d18.filesusr.com/ugd/f1a804_4fef2c7111f44d70a314a2a968c798b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liwafo/tom_clancys_splinter_cell_games_download.pdfIn PDF document text
    • https://3df06c22-1e8a-4082-8cc2-a0fdc0609706.filesusr.com/ugd/d86e81_cd8f6435cbb5437685bf3ac3dd714480.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dadupawo/4532243650.pdfIn PDF document text
    • http://bizedesaxifu.onlinewebshop.net/9051711403.pdfIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_c58c7c29475f404fb3618edf394031a6.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E9 5272 bytes
SHA-256: ff39b912e38e223487a1fa27be25df1a730245f40f22573f8b35b4520326456f
font_01_sfnt_off000116b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B4 12384 bytes
SHA-256: 19fa9adff0fd5400310f80630b4c9accf948d88ef130f9845c1279af3166f10b
font_02_sfnt_off00013f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F07 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e

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