Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7c887fdaf94356c…

MALICIOUS

PDF

77.2 KB Created: 2021-03-23 23:23:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8ae8e1c7070b549b292f03335e87b7a SHA-1: 8b0fb2a8cfb59442c87531fa68bc513c5b249531 SHA-256: c7c887fdaf94356cc5d84cb92a3f49b0ffdb5f9179cd1dda196a70438b8862a0
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, suggesting it's part of a link farm or phishing campaign. The primary URL, https://jumiwimov.ru/wix?keyword=skinny+asian+lettuce+wraps, is likely a lure to a malicious site. No scripts were extracted, but the PDF structure and link farm behavior are strong indicators of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/wix?keyword=skinny+asian+lettuce+wraps
    • https://cdn-cms.f-static.net/uploads/4426556/normal_5fd2262960db5.pdf
    • https://cdn.sqhk.co/tatidukigag/gdDsxX1/injustice_gods_among_us_ios_money_glitch_2019.pdf
    • https://cdn.sqhk.co/xagaxubibiz/hdjgoBj/dhoom_dhadaka_star_cast.pdf
    • https://cdn.sqhk.co/sonometa/7jhghfv/84141371813.pdf
    • http://lotibamuzuti.scienceontheweb.net/vanekujuv.pdf
    • https://cdn.sqhk.co/nejibija/hnjcMji/elite_motors_liberal_ks.pdf
    • https://cdn.sqhk.co/sirepajaku/hetw1M6/free_fire_wallpaper_download_hd.pdf
    • https://cdn.sqhk.co/nodujugebi/JjdiD6Q/best_chest_tracker_app_for_clash_royale.pdf
    • http://xakidofe.sportsontheweb.net/vokimolef.pdf
    • http://fosavaxenu.mypressonline.com/94577573283.pdf
    • https://cdn.sqhk.co/zoraxiraga/8ujfUTe/xajelegibitekelatibos.pdf
    • https://cdn-cms.f-static.net/uploads/4491410/normal_60349e5fc2991.pdf
    • https://cdn.sqhk.co/zevinikiwi/kHhhbhd/ringtones_for_galaxy_s9.pdf
    • https://cdn.sqhk.co/rikopekela/ahhiajf/smart_podcast_player_wordpress.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_bffcfa433ec24e0da2f4514ad20b5f8e.pdf?index=true
    • http://mozutulobiris.onlinewebshop.net/disposal_of_non_biodegradable_waste.pdf
    • https://288c7b4b-0494-48f6-8ee2-9dd519b96b0a.filesusr.com/ugd/a107db_f2b553d9deb04a7c91563b3b8484f4f8.pdf?index=true
    • http://rotufixijisadi.onlinewebshop.net/el_aprendizaje_basado_en_problemas_john_barell.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee55.bin
b186bf47be3a3970b0dab7b957dbe6519956a04db7a701acf860ef29c7f48105		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE55 5288 bytes
font_01_sfnt_off0001007e.bin
ba1721c0308d75bde0620c2899a2bc5613502bc119a96f74b738170612b29b7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1007E 11588 bytes

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