Malicious PDF — malware analysis report

Static analysis result for SHA-256 f05486d612f010fc…

MALICIOUS

PDF

98.8 KB Created: 2021-04-09 13:21:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 49b411afde05388062bdddde4d62fa0b SHA-1: 6e53ee91fda82e9ead36663c8b58daa922f6048e SHA-256: f05486d612f010fc111b4233a896dc64844b0ff12ab4882b82be7cdde784b2c9
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The presence of embedded URLs and the overall structure strongly indicate an attempt to redirect users to malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://vilenefex.ru/strik?utm_term=how+to+do+heat+calculations+in+chemistry PDF link annotation
    • http://volizaj.iblogger.org/how_to_connect_my_skullcandy_push.pdfIn PDF document text
    • http://pinopizo.sportsontheweb.net/1499159891.pdfIn PDF document text
    • http://runexutofo.iblogger.org/petujafo.pdfIn PDF document text
    • https://sigukelerodon.weebly.com/uploads/1/3/4/4/134491686/8955676.pdfIn PDF document text
    • https://govodiroruje.weebly.com/uploads/1/3/0/7/130775462/ae913bc2f2d38a.pdfIn PDF document text
    • https://sotugenedoximo.weebly.com/uploads/1/3/4/0/134040923/newizetutusurabube.pdfIn PDF document text
    • https://wavoxodasamemat.weebly.com/uploads/1/3/5/3/135348105/8009355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410190/normal_60619672aa813.pdfIn PDF document text
    • https://zoxiniguve.weebly.com/uploads/1/3/4/5/134584112/tabikadote_zomipubowa_gamidubifu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422909/normal_601d75bf4d27f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426547/normal_606b6277961de.pdfIn PDF document text
    • https://xedovederufag.weebly.com/uploads/1/3/5/3/135315932/1907603.pdfIn PDF document text
    • http://mojenisijita.mywebcommunity.org/17011551698.pdfIn PDF document text
    • https://nekazadezi.weebly.com/uploads/1/3/4/6/134662300/famapej_bojod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481275/normal_604026cc8a262.pdfIn PDF document text
    • https://tixuguzuw.weebly.com/uploads/1/3/4/0/134096155/8889365.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xejarejunap.rf.gd/emerald_green_arborvitae_care_guide.pdfIn PDF document text
    • http://baniteb.epizy.com/centrifugal_compressor_handbook.pdfIn PDF document text
    • http://koxowasone.epizy.com/fitijitivalajutad.pdfIn PDF document text
    • http://pidofesixud.epizy.com/98414072636.pdfIn PDF document text
    • http://warunegiluj.rf.gd/benefits_and_challenges_of_cloud_computing.pdfIn PDF document text
    • http://samanoniminowut.epizy.com/avent_breast_pump_user_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D12 5336 bytes
SHA-256: 5552dfb9a49676b1a41007326e5756f2b5fd807c36c381eff9df472daa4d5544
font_01_sfnt_off00013f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F1A 11656 bytes
SHA-256: 1f5e1629af828b8739881119b702b99d1b824cec1bf3a83da037cf063676897a
font_02_sfnt_off00016653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16653 16192 bytes
SHA-256: f7c959ef3840947929b2fbf21a6f844c3d2ba9157ff04f9c13ff486e75cc34e4