Malicious PDF — malware analysis report

Static analysis result for SHA-256 e56ae70912d4d4bb…

MALICIOUS

PDF

86.2 KB Created: 2021-07-08 04:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b3c1e9df479a8ec9a92672a8c58a1f29 SHA-1: cd55efe36888d296d366c48f08cf038d21da52e9 SHA-256: e56ae70912d4d4bb585251ffbe5796d8f46c37398777f641d8d368c5aeb04edd
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://congchunghadong.com/uploads/files/lusuzegevezodaren.pdf
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ceec37bab6---1436074837.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607acb7da59c8---rerasedajitefonukom.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b1178c24b---nesenidikofulikukakobi.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6b4a433f2---99505835866.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/hvfkata9e7idn9nv3dhj10l1k7/nutifebozelogaremubag.pdf
    • http://lroundup.com/clients/d/d7/d7466da0ad72d96b64793f89c518a0d9/File/45677516505.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e89dd8ff6---53553807247.pdf
    • http://joewhitefamilysite.com/clients/59967/File/93303045254.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/5515298926.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be6a1f2b6fa---68022104525.pdf
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/93449365455.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ced62f527ba---fumisinedubew.pdf
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/36230971262.pdf
    • https://harkakotony.hu/UserFiles/file/redabapumivipatodo.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d172c0b5b5---junazapipukixuveman.pdf
    • http://www.kickcommerce.com/userfiles/file/92337166214.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/gpamdpal97564katqc4avv7mo3/mabaxagetozapur.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/c6f13d1f7799547a61ec5b02c1819aa3/rulaza.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc36167458---90606021375.pdf
    • http://aarogyamedico.com/userfiles/file/79431802778.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=btts+tips+for+tomorrow
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef1b.bin
f7b59f98b686de771b12211eb26f909f6359bfabb91227e0402f8f15e82adf0a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1B 17576 bytes
font_01_sfnt_off00011cec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CEC 16792 bytes
font_02_sfnt_off00013503.bin
48263eab02784327508b7bd11fb99c887d3f194b4864ffc5d3958f4896e25879
pdf-font-stream PDF embedded font (sfnt) at offset 0x13503 10216 bytes