Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc689ab662798c23…

MALICIOUS

PDF

77.3 KB Created: 2021-02-20 16:20:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b38e698c6e93b7de73be296b1598c732 SHA-1: 91b6a2dd623f063103eb1fbd21be483b78ecf2ee SHA-256: cc689ab662798c2376795bfa4146dfcfd14a023b13159a274bb73b4cf89009d2
126 Risk Score

Malware Insights

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

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 0.9996

Heuristics 5

  • 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 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/wix?keyword=yth22v46+repair+manual PDF link annotation
    • https://cdn.sqhk.co/disarelas/jhfjcUE/towodiwikid.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/YgdhjgR/73190118945.pdfIn PDF document text
    • https://zumaraje.weebly.com/uploads/1/3/0/7/130776401/66198.pdfIn PDF document text
    • http://phtech.site/astor_piazzolla_oblivion_piano_sheet_music2vxns.pdfIn PDF document text
    • https://goxatuzibifonev.weebly.com/uploads/1/3/0/7/130739188/64ceb.pdfIn PDF document text
    • http://ig-soft-team.com/stuck_in_neutral_bookbd504.pdfIn PDF document text
    • https://gorixekaliwe.weebly.com/uploads/1/3/4/4/134439057/9103657.pdfIn PDF document text
    • https://cdn.sqhk.co/najafizox/g6zwTI3/38834684996.pdfIn PDF document text
    • http://dnepr24.info/sales_commission_calculator_templatega5k5.pdfIn PDF document text
    • http://cashbackk.site/solar_system_order_of_planetsa98du.pdfIn PDF document text
    • https://worivoka.weebly.com/uploads/1/3/4/5/134588103/jojasuzizo.pdfIn PDF document text
    • http://gufutaca3.xyz/qmp_board_dates4d10m.pdfIn PDF document text
    • http://kigurumi.org/cfdi_version_3._3_ejemploylck8.pdfIn PDF document text
    • https://kerozusokenizil.weebly.com/uploads/1/3/1/3/131383247/donefumafanilawurak.pdfIn PDF document text
    • http://itravelimpressions.com/sikapixekole2s50i.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/zjj0JQ9/20636762935.pdfIn PDF document text
    • https://gikigafe.weebly.com/uploads/1/3/4/4/134440869/lemosisemisik.pdfIn PDF document text
    • http://xsale.trade/sim_brothel_2_downloado82wh.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/bolovopizonuki/best_android_apps_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/90510576771.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/shutter_japanese_movie.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_off0000f1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A8 5276 bytes
SHA-256: dee59579b164054c1ae9d814d8b0f44fe17d4ef9d36e12cbf514f944923c02cc
font_01_sfnt_off0001037c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037C 10612 bytes
SHA-256: 01aa04dd61f5c40dcad4ac0680c779b59b20cccbb9678a9a1bab772fee3ef2eb

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