Malicious PDF — malware analysis report

Static analysis result for SHA-256 1449e1731e128c07…

MALICIOUS

PDF

73.0 KB Created: 2021-02-17 18:23:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f1e7b606fd04b26f2987f8e5df5d50a9 SHA-1: 5f2be5cc941d512abf16d7b96a412860705152a0 SHA-256: 1449e1731e128c0765bc34df073d42636a14cdf0ec20297699b58861b50ab309
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for a PDF link farm on disposable hosting. The document contains numerous external links, with one prominent URL being https://leonvi.ru/strik?utm_term=why+do+we+have+text+features. The presence of a link farm suggests an attempt to manipulate search engine results or redirect users to potentially malicious sites.

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://leonvi.ru/strik?utm_term=why+do+we+have+text+features PDF link annotation
    • http://lexidubug.22web.org/38257032503.pdfIn PDF document text
    • https://cdn.sqhk.co/tezakagadol/hjhenzY/vitamin_d3_deficiency_symptoms_in_marathi.pdfIn PDF document text
    • http://vashastrahovka24.ru/48205106112jf6ew.pdfIn PDF document text
    • https://cdn.sqhk.co/gatutojuse/PjjbyXI/venedabo.pdfIn PDF document text
    • http://pexevuvukez.iblogger.org/70776291885.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/jaha5bB/stock_market_simulator_calculator.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/gtHi2hb/dragon_city_breeding_legendary.pdfIn PDF document text
    • http://pro-konditer.com/refawujevafu8tjxf.pdfIn PDF document text
    • https://welomutulek.weebly.com/uploads/1/3/4/8/134873792/1219981.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/ijeqSjg/moon_patrol_online_game_free.pdfIn PDF document text
    • http://ru-payment.casa/vekibesafuxilixinurcrpp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rufazigivemebod.rf.gd/96887171651.pdfIn PDF document text
    • http://lumawasisoxo.rf.gd/55266573676.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_off0000e094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE094 5300 bytes
SHA-256: a2603ee855464c884850d6bbebaad1923fdf7ec825febacde8e086659e610626
font_01_sfnt_off0000f2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BB 10168 bytes
SHA-256: 12db0d57c7dc31a8d44f7c552902d93d3aa03e3dc0dd6b4514edd16a62e440d5

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