Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be93be7bc630570…

MALICIOUS

PDF

75.1 KB Created: 2021-02-11 02:59:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 50a28433eeb3062b5b903d8b715b84a4 SHA-1: 67429dba4c5c02f31dc31367565bc06fa848ab6c SHA-256: 9be93be7bc630570e7f53e1b9402f731e390c3111e935283db8f7021a79e98ca
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, characteristic of a link farm designed to manipulate search engine results. The document body, though heavily obfuscated, contains text suggesting a lure related to a "criminal case hacked version". The presence of a PDF link farm and external URI firings strongly indicates a phishing or redirection attempt, likely to deliver further malicious content.

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://maypoin.ru/123?utm_term=criminal+case+hacked+version PDF link annotation
    • https://cdn.sqhk.co/pipujevi/haP1Bjw/dabuperafuxupizajopa.pdfIn PDF document text
    • http://delayikapy.xyz/bafemipuxitelinoradageji935c3.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/Xichjbc/arcade1up_mortal_kombat_riser.pdfIn PDF document text
    • https://wujibinofowe.weebly.com/uploads/1/3/1/3/131383737/49ef54d238.pdfIn PDF document text
    • https://xapitutas.weebly.com/uploads/1/3/0/8/130813648/kepemupogufotu-semunosale.pdfIn PDF document text
    • https://dowebirajosem.weebly.com/uploads/1/3/6/0/136010559/guwilumazux_solubekowesu_worirofeju_tolawavikusu.pdfIn PDF document text
    • https://murafasonuralab.weebly.com/uploads/1/3/5/3/135398902/zujotaragi-togudaboso-fezumofujewo.pdfIn PDF document text
    • https://vijilipaguwojig.weebly.com/uploads/1/3/4/8/134872157/bf517.pdfIn PDF document text
    • https://cdn.sqhk.co/vexorikodo/ctsjbhf/goal_goal_tips_app_on_iphone.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/sojenozap/37544913565.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/libro_actos_de_fe.pdfIn PDF document text
    • http://jiwajazaj.rf.gd/bejeweled_twist_free_full_version_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/30849134094.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_off0000e7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D1 5208 bytes
SHA-256: 454eda9c02516c72476504f7d134b5d3583439ac36a5e41093393a43c6f06963
font_01_sfnt_off0000f954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF954 11124 bytes
SHA-256: 277c353a11ead6c4962fe3e4ac570f382d8d27fc28fb1909f4fc5616f02b1a8e

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