Malicious PDF — malware analysis report

Static analysis result for SHA-256 fed102ed98dcc06d…

MALICIOUS

PDF

81.3 KB Created: 2021-03-09 02:11:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 047a2f9354aa9c6302459b143a43a011 SHA-1: 5c9e0d1e5ebfc911035e60e99e931342167794fa SHA-256: fed102ed98dcc06d6ded3ac89bb9ca706f0af32c2d356b13974f38cff53fa066
134 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with one prominent URL pointing to a suspicious domain that appears to be a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to downloading a "Tnpsc hall ticket".

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/award?keyword=tnpsc+hall+ticket+download+pdf+file PDF link annotation
    • http://reduslimitalia-official.website/dovirusazilozozaf89nf.pdfIn PDF document text
    • http://wapadax.scienceontheweb.net/13361967094.pdfIn PDF document text
    • http://sujimelowakolop.medianewsonline.com/hp_officejet_7612_printhead_part_number.pdfIn PDF document text
    • http://bibopasaxuvibu.mypressonline.com/how_to_apply_cbt_for_depression.pdfIn PDF document text
    • http://bigowet.xyz/pavoxuwekawidowes97xy.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/ruwosazamedubopam.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/gopifu/20299706482.pdfIn PDF document text
    • https://69868269-04aa-4a0d-8379-1371762fd556.filesusr.com/ugd/d8beff_f7a9c9de268d4a55bfec60aa8ef1d97b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sabegokek/narasimha_movie_songs_ringtone.pdfIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_aa3f0c03739547cdbfaf1c3f5c50e45e.pdf?index=trueIn PDF document text
    • http://bopudax.epizy.com/radavakabomekiponezid.pdfIn PDF document text
    • https://9539e3d7-93ad-434a-85ac-22bd9bdb82bb.filesusr.com/ugd/df7b34_cee1e5614de942dbbb71a5b06c830096.pdf?index=trueIn PDF document text
    • http://duvewukabiwetu.epizy.com/what_is_the_main_idea_of_click_clack_moo_cows_that_type.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dc45f63-9ec9-4f39-a1df-4bc463d7ad5b/82208081859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24b382be-d775-430d-952a-26a916cde646/zexofazudituvozilopol.pdfIn PDF document text
    • https://f4b9ed98-44c1-44e6-9966-d9817cd43de7.filesusr.com/ugd/9ced5d_3f06e09e5088406db6e38acb637623cc.pdf?index=trueIn PDF document text
    • http://bexituxupogetav.rf.gd/6118418872.pdfIn PDF document text
    • http://xoxigibutu.epizy.com/10238338041.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/java_1._8._0_221.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/pivuzubixigimifabedunuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a6bce3e-0c5d-496e-8c1a-b8cb437c3d01/50638321120.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_off000102f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F8 5252 bytes
SHA-256: 7d59ad86015e338fba045198be454807295955ad72f1b90b0a125d6787dcfeea
font_01_sfnt_off000114e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E8 10380 bytes
SHA-256: 85e8eac9c65c90a5bbe76e0cbf4ff82dc463044eae3f70151849d2bf0ff3becc

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