Malicious PDF — malware analysis report

Static analysis result for SHA-256 385ad46b1eafad0c…

MALICIOUS

PDF

103.2 KB Created: 2021-05-15 03:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 051fe5c8fbd091a7b9ed8d3d3356e090 SHA-1: 5f58a23550483e465c76fc25f20728ce499d6ceb SHA-256: 385ad46b1eafad0ccbf2d5ca57c4ddec74209101c6d515ccda0cf67e89e25475
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or lead to phishing sites. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. The document body, though heavily obfuscated, contains keywords related to job searches, indicating a lure to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=kelly+services+warehouse+jobs+near+me PDF link annotation
    • http://gonimuliveza.22web.org/80303541195.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojiranat/dp5CjjB/force_and_destiny_game_master_s_kit.pdfIn PDF document text
    • https://cdn.sqhk.co/binisomomup/chdVTUG/big_windup_anime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369912/normal_6046a7977b995.pdfIn PDF document text
    • https://cdn.sqhk.co/gijimexuv/YibhefG/rijawogaforone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489237/normal_605d3aaa4e59f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421624/normal_5fc708d724e2c.pdfIn PDF document text
    • https://cdn.sqhk.co/fexonawizoz/Kgfajey/meesaya_murukku_hd_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/zapakolozu/ihjwHAg/yellow_book_cpe_webinars.pdfIn PDF document text
    • http://benosetib.iblogger.org/fetumusavo.pdfIn PDF document text
    • https://cdn.sqhk.co/wokinuge/pgcX9jG/what_are_clue_words_for_problem_and_solution.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423453/normal_60219e41dbc7f.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/Mq0gi75/gagahi-_dating_chat_meet_foreign_friends.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/VqLbjjQ/volexanagilojuxekotoloziw.pdfIn PDF document text
    • https://cdn.sqhk.co/neganobasiwe/phDrRp2/catchers_latest_version_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xavipinav/0jeTZNs/latest_2018_games_for_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_397249e412b040d38490d9bda854a577.pdf?index=trueIn PDF document text
    • http://zegaruso.rf.gd/manual_bancanet_hsbc.pdfIn PDF document text
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_95f83557a34749a1b16a394cdb63495f.pdf?index=trueIn PDF document text
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_e4c799fb582042e994a4a73c764fab07.pdf?index=trueIn 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_off000155de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155DE 5480 bytes
SHA-256: b69726b8e57e6b8e19f4aed8619b9257249fae078938bba02082ba4f6e98fbbd
font_01_sfnt_off0001687b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1687B 11252 bytes
SHA-256: 24408df6507c471addcdc725f7177578492fe18eb7d18df6991cec99726d5a85

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