Malicious PDF — malware analysis report

Static analysis result for SHA-256 044d7a8e8edbf14a…

MALICIOUS

PDF

76.3 KB Created: 2021-03-19 22:08:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fbe780eadc8de0f0f6a155567ce8186 SHA-1: a22cca890430f3908baa104ade32e10d61688d06 SHA-256: 044d7a8e8edbf14afab8fd35256e0950b8101e82f73c2717c2ed714e286b7375
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The file contains a large number of external links, many pointing to other PDFs, suggesting a link farm or redirection mechanism. The primary external URI, https://vilenefex.ru/award?keyword=klondike+solitaire+rules+pdf, is a strong indicator of malicious intent, likely leading to a phishing page or a payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/award?keyword=klondike+solitaire+rules+pdf
    • https://nunesevafarub.weebly.com/uploads/1/3/0/8/130874378/sugerogos-lutizufonisaji.pdf
    • https://cdn.sqhk.co/kojetovukufo/egegfzg/67362538068.pdf
    • https://timakopazasiri.weebly.com/uploads/1/3/4/4/134445807/9219478.pdf
    • https://cdn.sqhk.co/lilavokolet/LtcpgjI/report_illegal_dumping_qld.pdf
    • https://vaferevipesefur.weebly.com/uploads/1/3/0/9/130969420/misemepumurapoj-zuboj-derazupakax-zedazakolix.pdf
    • http://wapuwesifatirok.iblogger.org/blockly_android_github.pdf
    • http://milanomoda.site/73062540980eehwd.pdf
    • https://gebobofivogaxe.weebly.com/uploads/1/3/5/3/135308574/tinukatisivezo-sezimejugo-vemomaxurimogi-xiwir.pdf
    • https://cdn.sqhk.co/xinefegepe/hcjjjgY/new_bubble_shooter_games_online_play.pdf
    • http://study-english-05.site/islamic_marriage_contract_templatekjtkz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kexepujufe.rf.gd/komipiwiwilesuvesimixozux.pdf
    • https://uploads.strikinglycdn.com/files/a3fcc194-bf56-474a-bd7d-7d188b491cdb/capricorn_28_degrees.pdf
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_cad865a0425f4f0aaf1de21b34ae4e00.pdf?index=true
    • http://wajobodiposad.epizy.com/gopufe.pdf
    • https://abaaaae4-9231-44fc-b12c-ad55ebcc68e7.filesusr.com/ugd/2ca09c_9024411acfdd4721b027bdf5f6aeec11.pdf?index=true
    • https://3f7ff619-1e23-491c-a925-ddda4d79b49c.filesusr.com/ugd/79c22a_13799524338047bfa81d7c927424828d.pdf?index=true
    • https://ee897e78-a157-4eb5-8a47-d615096087a2.filesusr.com/ugd/113e89_3b32df0d0f784bbe89120db0d070d43c.pdf?index=true
    • https://69f1164a-dcd3-4310-9fb4-3b67f03bdbb0.filesusr.com/ugd/9d7282_3241982ee3e14a33b695f71f60920d1b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/162713a6-1a3f-4054-b97b-a54319386f8c/simplex_4100u_manual_espaol.pdf
    • https://uploads.strikinglycdn.com/files/15864c2e-40d7-47dd-86ed-be98f70e318d/they_say_i_say_4th_edition_chapter_summary.pdf
    • https://uploads.strikinglycdn.com/files/f5066737-7dc8-4712-a3e5-34912bf07d1d/frostgrave_combat_rules.pdf
    • https://uploads.strikinglycdn.com/files/21ac0011-e595-4bce-a375-cbd306f62c8a/cisco_rv325_firmware_1.5.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_off0000ee6d.bin
76d2392df83e0df313f438824c7f20551bb6c79f75672eb78965fa682ce22492		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6D 5068 bytes
font_01_sfnt_off0000ffbb.bin
f6fe8eeb5b3fe3fe8af35aaac0fb351ed4c45ccaf81068de0383da645790beb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBB 11120 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.