Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4cd8010ed14a53…

MALICIOUS

PDF

76.4 KB Created: 2021-03-23 04:47:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9df7cf63c1d6a38b7cdea1977a3a8afc SHA-1: 5344b51fdb5e649001bf746fb715797ed908e8e0 SHA-256: 9c4cd8010ed14a5310a048eb037d3bb1037e665309924a3f3fcfb4d17ebb7c7b
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of a large number of external links, many hosted on disposable domains, suggests a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/aws?utm_term=rain+bird+32eti+canada PDF link annotation
    • https://tugigoboz.weebly.com/uploads/1/3/4/4/134499705/pesamijere_wosaxujab_mexoludup_nikalazam.pdfIn PDF document text
    • https://jutulomivepira.weebly.com/uploads/1/3/4/7/134775876/bba01e.pdfIn PDF document text
    • https://gokopamamipor.weebly.com/uploads/1/3/4/0/134000031/lubovulirav-fareke-wutogusenaz.pdfIn PDF document text
    • https://nelunozulugekis.weebly.com/uploads/1/3/0/7/130739970/d03749b40.pdfIn PDF document text
    • https://xenesadu.weebly.com/uploads/1/3/0/7/130739949/roveneb.pdfIn PDF document text
    • http://natbeach.space/probability_worksheet_with_answers0mf6q.pdfIn PDF document text
    • https://disaximineta.weebly.com/uploads/1/3/4/8/134883765/raniro_nujada.pdfIn PDF document text
    • https://lajadarizigatu.weebly.com/uploads/1/3/1/3/131384611/bd146a50e0681.pdfIn PDF document text
    • https://bajumavo.weebly.com/uploads/1/3/4/4/134486103/gumebo.pdfIn PDF document text
    • https://bifetidenogu.weebly.com/uploads/1/3/1/3/131379340/e1536b29.pdfIn PDF document text
    • http://tokigarodam.22web.org/antronix_amplifier_manual.pdfIn PDF document text
    • https://govumiseli.weebly.com/uploads/1/3/1/3/131380651/1069634.pdfIn PDF document text
    • http://idealica-co.site/25806621294jvi26.pdfIn PDF document text
    • https://nimewoguvinu.weebly.com/uploads/1/3/4/4/134433183/6866170.pdfIn PDF document text
    • http://online-bestshop.xyz/cost_volume_profit_analysis_example_excel6h1a5.pdfIn PDF document text
    • https://lejawoxaniw.weebly.com/uploads/1/3/0/7/130738778/c6a64ac63ad7c68.pdfIn PDF document text
    • http://wejutejejuwow.iblogger.org/how_to_use_sharper_image_aromatherapy_diffuser.pdfIn PDF document text
    • https://dapapakutuluj.weebly.com/uploads/1/3/1/3/131384169/fipivetawotaz-gemedetexona.pdfIn PDF document text
    • http://piredvizhnik.com/54228777187m821d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zunuwovadete.epizy.com/bujabubodiduripipuvi.pdfIn PDF document text
    • http://pudopotodu.epizy.com/alfie_evans_court_decision.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_off0000eab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB4 5164 bytes
SHA-256: 3347c80e501fa8d9b2b2aa1d11de645e5e2b5ce6ac17241f956ad621925e525d
font_01_sfnt_off0000fc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC52 11404 bytes
SHA-256: f67249a9a53704274861997880645e2013915ac880d96d1ad76a074aacc966bc

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