Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa022ff5147b8af…

MALICIOUS

PDF

82.1 KB Created: 2021-05-13 18:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 659e83567f44b0488a997fa858d127f0 SHA-1: ea599634955b9c3fa6b34fe3e70c4555d2eec80f SHA-256: 9fa022ff5147b8afa76b5ae73b9cc14406b091767c6de3b847316a0a1d2410f7
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded links and the 'how to download' theme in the document body suggest an attempt to trick the user into visiting malicious sites or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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+download+all+marvel+comics+for+free PDF link annotation
    • http://mazisim.mywebcommunity.org/fakamejiborovovadatenixaf.pdfIn PDF document text
    • https://cdn.sqhk.co/mumesimasozo/f1ih070/range_rover_sport_off_road_build.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_6021741508b86.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/jizUZtE/66909588038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477655/normal_5fd60e4dbc4a4.pdfIn PDF document text
    • https://cdn.sqhk.co/pulununese/46VHgjg/hello_neighbor_cheats_xbox_one_act_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410190/normal_5fe771d78e7b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501770/normal_6008959d73750.pdfIn PDF document text
    • http://jomikifu.medianewsonline.com/94713486457.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/kiaiaXF/remote_control_battery_operated_outdoor_christmas_lights.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/051f7ac7-11e8-4c7a-a00f-4c5f55295cd4/pomubaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d5b88a3-8671-46cb-ac10-8fdac4153f33/live_traffic_walt_whitman_bridge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fbcba57-0070-4bad-8d6a-5b49e1e4cfaf/veburevox.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/portuguese_english_visual_dictionary.pdfIn PDF document text
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_442b67dfd2b94165994c61ef7681d56e.pdf?index=trueIn PDF document text
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_9f48fcf2486a4845bf0d02781e7b1afc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9db4e7e7-67d1-42cf-be2d-d0ae1aab6f18/hp_officejet_pro_8500_not_printing_all_colors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7542da3-6dbe-4689-927a-a704b05984d5/solasenulusovapu.pdfIn PDF document text
    • https://39c3e2ba-dcb8-4bc0-9ed7-0058f02c59d5.filesusr.com/ugd/fd4c29_414365a668504ccea701711c28b334a5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb9e4819-0421-4a84-bd9a-13ef4ed90ad6/pofomogabokopuvolonoz.pdfIn PDF document text
    • https://2b81f3f0-3f46-42ff-87a7-5865dd96cd3c.filesusr.com/ugd/fb41f9_5dedbd17c2144be38e2982932416ff23.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/de1db9e6-5dff-4eff-ab23-f3120bdb2f53/26789993763.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_off00010147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10147 5280 bytes
SHA-256: ece1cbbee6da2330bfae237391ba8f76cf8e9a04256d4c9ff4958eb639945906
font_01_sfnt_off0001133b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133B 11728 bytes
SHA-256: 6c4df4f91d13b7265ba1015e5d996a13ed769697fa24627883ddca6a028600f8