Malicious PDF — malware analysis report

Static analysis result for SHA-256 05b1e66751f650a3…

MALICIOUS

PDF

130.2 KB Created: 2021-05-15 22:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1208f0aa1231b124137a6af49e277768 SHA-1: aec5b9947662c49225aa216588ec7fd7ccf0ab21 SHA-256: 05b1e66751f650a39235b2a29ef1a7d737ec43736e98d45cff021a60827bff2f
186 Risk Score

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 0.9997

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/strik?utm_term=albert+camus+myth+of+sisyphus+analysis PDF link annotation
    • https://cdn.sqhk.co/laloropaki/p5uZjh2/beautiful_wallpaper_hd_for_mobile.pdfIn PDF document text
    • http://midekupe.22web.org/appearance_vs_reality_hamlet.pdfIn PDF document text
    • https://cdn.sqhk.co/nenafodud/xjcyfhe/tewoduwezolep.pdfIn PDF document text
    • http://golipodib.22web.org/acmarket_apk_app_for_android.pdfIn PDF document text
    • https://bugedosase.weebly.com/uploads/1/3/2/7/132712019/suwatig-dotam.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/2yH4Maw/apple_strategic_plan_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/fubebevukad/him98hj/situzewisodakiwas.pdfIn PDF document text
    • http://bekusasodix.iblogger.org/93380011376.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/VjGgslu/rapid_city_airport_long_term_parking_rates.pdfIn PDF document text
    • https://vunemagerubu.weebly.com/uploads/1/3/4/5/134525741/9fe8e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_61fe621309324382a8fec2356a8eaea0.pdf?index=trueIn PDF document text
    • http://guxozuzemonixe.epizy.com/mudif.pdfIn PDF document text
    • https://c4a5d104-04f9-44e6-b03f-1f5edac3680f.filesusr.com/ugd/f23921_e85a9e6c3546454fafe22b73c774ec8a.pdf?index=trueIn PDF document text
    • http://neveket.epizy.com/59296551866.pdfIn PDF document text
    • https://8bbfbdb8-1895-4472-a1c6-9e834ce25a60.filesusr.com/ugd/7deb27_e35ad6c3cccb438fbebda10f456748cf.pdf?index=trueIn PDF document text
    • http://banumekopi.epizy.com/ballot_template_2019.pdfIn PDF document text
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_e09975b49a05491a9156ad2222c18552.pdf?index=trueIn PDF document text
    • http://ziladujaxizi.rf.gd/sirenurepujaxemidibud.pdfIn PDF document text
    • https://4b523d79-2bc6-404f-8e52-0acae4d2cb03.filesusr.com/ugd/fe1b41_dd3e0b7491db4dc3bb78bed06697cf28.pdf?index=trueIn PDF document text
    • http://xibiwoziveva.epizy.com/38379874687.pdfIn PDF document text
    • http://bivuraxut.rf.gd/sufigun.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_off0001c377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C377 5484 bytes
SHA-256: a872237d8ed8e2fa0f2e158329635bb96875f2e36e007bdd83d12805371ad31f
font_01_sfnt_off0001d5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D5FC 10920 bytes
SHA-256: c5e4634633d00706aa5518f4e1477ba4db98a785a2eaa44f1bafb20573bb2bc8

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