Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b017dcf6fa04a1…

MALICIOUS

PDF

77.4 KB Created: 2021-02-28 09:52:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 28d733e8ed946ae31f4271829f803119 SHA-1: 61048b61df19d0ff0f2f2a220e67fe9c0ab1eabe SHA-256: 79b017dcf6fa04a1f78e0461eb9933ac34ec63f51e7610f90de74e776be6b942
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The embedded links, such as 'https://bologen.ru/award?keyword=casio+ga-100cm-8adr+g-shock+erkek+kol+saati', are likely intended to direct users to malicious or deceptive websites. No scripts were extracted, but the PDF structure and numerous external links indicate a phishing or spamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/award?keyword=casio+ga-100cm-8adr+g-shock+erkek+kol+saati PDF link annotation
    • https://wagidojinubem.weebly.com/uploads/1/3/1/4/131438567/mejofukekedamo.pdfIn PDF document text
    • https://muwikoli.weebly.com/uploads/1/3/2/7/132740525/760985.pdfIn PDF document text
    • https://pidumiwululixew.weebly.com/uploads/1/3/4/0/134095913/tilotovadim.pdfIn PDF document text
    • https://kufesivewafe.weebly.com/uploads/1/3/1/3/131384244/dofinav.pdfIn PDF document text
    • https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/jopidapewama-nomufexa-xofeketokuxe.pdfIn PDF document text
    • http://pumujavebedopa.iblogger.org/66140056018.pdfIn PDF document text
    • https://kiwiwutirove.weebly.com/uploads/1/3/4/7/134707888/jobedugumolekikifit.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/1dd1f92a0.pdfIn PDF document text
    • http://gebajajax.22web.org/mcpe_mods_android.pdfIn PDF document text
    • https://joninotabuxid.weebly.com/uploads/1/3/5/3/135387421/1391263.pdfIn PDF document text
    • https://lepoboniw.weebly.com/uploads/1/3/0/9/130969744/4921784.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/lofese/cambridge_igcse_chemistry_workbook_answers_second_edition.pdfIn PDF document text
    • http://tebaxisabajix.rf.gd/samosekagalubile.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/vibanowepowipetekajapisu.pdfIn PDF document text
    • http://bixuxopot.epizy.com/xamopidoripetam.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_off0000e314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE314 5740 bytes
SHA-256: f762146e0c53024a42850a238ae23e0c052427380a021fd9c25e82f261a68281
font_01_sfnt_off0000f678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF678 15904 bytes
SHA-256: 2cdebb7824931d16b6adb3ef37fec59c481b4c04a54336e8154da906d2e39f0e

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