Malicious PDF — malware analysis report

Static analysis result for SHA-256 f460c21691e04e6d…

MALICIOUS

PDF

105.2 KB Created: 2021-03-20 00:31:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 222320ea6142bb532c9def38139177cf SHA-1: 1d734b595f58ef1e900375ee7fd71b4a588806b3 SHA-256: f460c21691e04e6d2ee6cd067b3a358da4fd4ef2e98e165edfbf7d627ca216c6
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, a common tactic for SEO manipulation or distributing malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the presence of numerous external URLs suggests the document's primary purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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://kuzutuzo.ru/wix?keyword=accompanies+critiquing+floral+arrangements+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/tajudozizif/iifgc8U/zarchiver_pro_download_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/lSjgUY6/rope_frog_hero_rope_ninja_fighting_games.pdfIn PDF document text
    • https://tikobivit.weebly.com/uploads/1/3/1/3/131382680/jaxeluz.pdfIn PDF document text
    • https://pugufewosanagut.weebly.com/uploads/1/3/4/3/134331363/57cbed0e49c.pdfIn PDF document text
    • https://navuvosukogeguf.weebly.com/uploads/1/3/1/4/131454151/c32b703e901958c.pdfIn PDF document text
    • https://jelaxatibepa.weebly.com/uploads/1/3/2/6/132681396/bef829d0c775a.pdfIn PDF document text
    • https://cdn.sqhk.co/pabefidinaz/Mhb3bii/steel_pulse_true_democracy_zip_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vizakifito/if2aXnq/74259995046.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovipawe/haRictV/urban_car_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/sozonexof/hjKhev1/kinusemitigadujiruluranam.pdfIn PDF document text
    • https://cdn.sqhk.co/tudusiki/dktMih6/rebidaxakajawepazu.pdfIn PDF document text
    • https://befinutu.weebly.com/uploads/1/3/5/9/135971501/11edc3e9b9d.pdfIn PDF document text
    • https://cdn.sqhk.co/sadetujadufi/hhajhTs/zunimaxedolowovutoziw.pdfIn PDF document text
    • https://cdn.sqhk.co/sowanigog/ucbhiib/infinite_flight_simulator_full_unlocked_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/suwajipufo/djaqkhg/young_living_essential_oils_reference_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/powurejur/hjJhdhj/refuseruvuvodolebanipax.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/dosipive/bartender_ultralite_9._2_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/leed_core_concepts_guide_version_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65326031-7fe0-4315-8cf2-6068097de531/love_story_lyrics_video_song_download.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/cannondale_topstone_sora_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/anarchy_acres_treasure_map_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45acd99f-b097-4f2e-9b90-c4a817d25a31/23839609013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c6fce8c-e3c4-4042-aa8f-0e38be072b88/brother_lc101_compatible_ink.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47e64afa-88bd-4639-9475-e870e5251157/gidisavixexefido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ce45dc3-f75d-40bf-ad3e-594ed589c59d/daily_life_of_ancient_egyptian_farmers.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/xifizetakixedabupuzasowe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EF4 2828 bytes
SHA-256: b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a
font_01_sfnt_off000158ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158EF 5700 bytes
SHA-256: 8cf5177b397ae08da9072d013b63a38a3fed3e045d225bdf31567ff99b0cdbb2
font_02_sfnt_off00016c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C39 12592 bytes
SHA-256: 376fd85ec4e960ac0d359b0e69a0e5f217d8975972b9331c774fd2107d1c1bc2