Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd4d48e61376c79…

MALICIOUS

PDF

68.9 KB Created: 2021-04-19 13:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 09bdfecfbc98b0b559a93fac54bd4e48 SHA-1: 85e21440ed4183d409652ca0120b344ef823fbfb SHA-256: 9dd4d48e61376c79b79769024b0bd8fb321a066d998afcfa6a703e8df4cb8c38
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://lozipotod.ru/strik?utm_term=how+to+reboot+motorola+sbg6580 PDF link annotation
    • http://gakmancreatures.ru/what_does_time_travel_narrative_mean7db6n.pdfIn PDF document text
    • https://cdn.sqhk.co/bumogebiz/5FjdjfL/rilimetupisobuwolitowigo.pdfIn PDF document text
    • http://woodlesenka.ru/dotaketipewabplr.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/jjidih1/23547168998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502188/normal_602e34493e501.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501659/normal_6011e2986abfa.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/hp_laserjet_4200_maintenance_kit_part_number.pdfIn PDF document text
    • https://cdn.sqhk.co/purilusevike/iawfoje/85065719221.pdfIn PDF document text
    • http://igbusinessabouthelp.com/texas_instrument_ti-83_plus_price2vl31.pdfIn PDF document text
    • https://cdn.sqhk.co/norumuwapa/miwgcW2/sunbeam_kerosene_heater_model_ohr_g28h_manual.pdfIn PDF document text
    • http://new-leggins.site/how_to_speak_english_fluently_in_10_daysh84bk.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/jhgRqif/97164832725.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468534/normal_604d90c01593d.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/jirIjhJ/download_game_alien_zone_plus_mod_apk.pdfIn PDF document text
    • http://lowufadit.scienceontheweb.net/43601170758.pdfIn PDF document text
    • http://fitokaps.xyz/grandstream_gxp1405_manual5esch.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9402c905-8710-427f-a5a4-039260ca90e0/jugubogamunufote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f73a1d2-f7f7-4ba8-9b90-b2763f60618d/33537169683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47cb586b-d571-4850-bcba-9679989a7db6/wotefukikiraxuxabolokiwaf.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_off0000cedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDD 5812 bytes
SHA-256: 849739465ce8d779238dde9b73fc91406c3a026034194e1e9983120cf0f9d844
font_01_sfnt_off0000e29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29E 10112 bytes
SHA-256: afb06c889cdab02cf80c5584c3b929064aafd661fac0b8fc72001c49eed163a1

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