Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f96af93ac14766d…

MALICIOUS

PDF

64.9 KB Created: 2021-02-13 22:51:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cc7198275e1863de9fa4a3e4807c7862 SHA-1: c974c5a658daca4915a44c72d995284bc77c51b5 SHA-256: 5f96af93ac14766de2ab41c226697e875d42df3b0d0d77bbbef77939b0c418a5
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spam campaign. The presence of a URL related to 'wapking. in punjabi songs' suggests a lure to potentially malicious or unwanted content. ClamAV and ML classifiers also flagged this PDF as malicious, likely due to its structure and embedded URLs.

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/wb?keyword=wapking.%20in%20punjabi%20songs PDF link annotation
    • https://cdn.sqhk.co/livisade/wnheHyB/xugogaloxilaluware.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/jhjjb8P/talking_bird_mask_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/supopareso/imjeLjj/xepobuguzef.pdfIn PDF document text
    • https://cdn.sqhk.co/xejokenu/frds0Lj/fizexufakivovukiburotof.pdfIn PDF document text
    • https://rezikixudagip.weebly.com/uploads/1/3/4/7/134746502/sisoraripewukop.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/aUhiQhb/download_game_hotwheels_infinite_loop_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/jeihS9S/61955955566.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/jhSij9I/borisixapuvukotinepuxigek.pdfIn PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/1724068.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xenuduximowub.epizy.com/guidelines_for_conducting_a_business_meeting.pdfIn PDF document text
    • http://taperimogitunal.epizy.com/finekowogowokomawudokudov.pdfIn PDF document text
    • http://valogaberel.rf.gd/delaware_annual_franchise_tax_report_extension.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/devilsaur_farming_guide_wow_classic.pdfIn PDF document text
    • http://jefusebu.epizy.com/landlord_notice_to_quit_tenancy_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/saberimawoxef.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/assoluto_racing_apk_mod_sbenny.pdfIn PDF document text
    • http://kozifina.epizy.com/botello_elementary_school_uniform.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_off0000c4f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F1 5184 bytes
SHA-256: 5dad0cfdca4f97bad8ab0d4b1b25d404526e0a8e3a1ad5e78753b05cfecf5042
font_01_sfnt_off0000d6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C5 9396 bytes
SHA-256: e29a596ffa2900b47ff909cce315f90feb9f04199dbbc301d55eee3ee6861475

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