Malicious PDF — malware analysis report

Static analysis result for SHA-256 dedd9b1bc721db44…

MALICIOUS

PDF

78.0 KB Created: 2021-03-12 17:27:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e6e4f1567062a47c6a1234d04df8eeff SHA-1: 53d3ce0b80bf50986e381d9bedc8da388210b3ab SHA-256: dedd9b1bc721db44ddc7df9ad341ab08f6c7cd58ed22ed549e0d8475b8f92fd7
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, with at least one pointing to a link farm on disposable hosting, suggesting an attempt to obscure the ultimate destination. The document body, though heavily obfuscated, contains keywords related to 'Tamil news paper today pdf download', indicating a potential lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/award?keyword=tamil+news+paper+today+pdf+download PDF link annotation
    • http://wisatemubudu.medianewsonline.com/33156158944.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/hNhJ6B6/45816788564.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/zjeVwvF/can_you_escape_level_11_answers.pdfIn PDF document text
    • http://tufataf.22web.org/applied_building_information_modelling_and_management.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/Qjihbjj/tizekuxufijademabu.pdfIn PDF document text
    • http://kovatafob.mypressonline.com/41957303489.pdfIn PDF document text
    • https://cdn.sqhk.co/rogenujudita/rgiPhdM/54769733017.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jagux/how_to_install_focusrite_scarlett_2i2_on_windows_7.pdfIn PDF document text
    • http://nokexekakupi.epizy.com/kevimemufekejosizatasiku.pdfIn PDF document text
    • http://kekusilubuf.epizy.com/47187507013.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/toxicology_report_nz.pdfIn PDF document text
    • http://vowipinarofesax.epizy.com/auto_mechanic_helper_jobs_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1aa001a-0991-4c5e-a038-282123f9f43a/komufopudusileton.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/why_is_my_hp_printer_not_picking_up_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/first_grade_spelling_practice_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c3f0c08-28c4-410c-b2b8-54cf1d1f6937/dd_5e_warforged_feats.pdfIn PDF document text
    • http://babudenipovux.rf.gd/instant_report_app_for_instagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f82e4d82-48b5-4279-9e70-33be744bf813/vizelawa.pdfIn PDF document text
    • http://fizenigapajawak.epizy.com/criminal_damage_act_1971.pdfIn PDF document text
    • http://wolumonixor.epizy.com/gisakasewadituwebenejep.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_off0000e990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE990 5332 bytes
SHA-256: 70b3aa9aff3df3dc8b1773cb2d7172ae6f150c8403daba9be1efe6d08a1353ea
font_01_sfnt_off0000fbb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB4 14176 bytes
SHA-256: a23e49f3782b05395f33d970fc1bd21ede17f338a03daa534783a02f7f1d223b

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