Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ea018f60bf8ecc…

MALICIOUS

PDF

77.5 KB Created: 2021-03-16 17:36:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7b69b497efac4f038f06feedc803f6b3 SHA-1: e2784ff5a55acccbd1cbb07425763db7a0ac7c72 SHA-256: 60ea018f60bf8ecc80d7fd3e8e333337b899c73326ef953fca76e8fbd18061bc
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a PDF link farm. It contains numerous external URIs, with a critical heuristic flagging a mass of external PDF links. The document body is heavily obfuscated, but the presence of URLs suggests an attempt to redirect users to potentially malicious content. No scripts were extracted, but the PDF structure itself is being leveraged for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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/123?utm_term=calma+song+free PDF link annotation
    • http://gakagebir.mypressonline.com/im_ok_youre_ok_summary.pdfIn PDF document text
    • https://baxojozejaxofo.weebly.com/uploads/1/3/4/5/134586757/2781333.pdfIn PDF document text
    • https://figowemepiwe.weebly.com/uploads/1/3/1/3/131398533/3640406.pdfIn PDF document text
    • http://buwubaled.mywebcommunity.org/mugomefavuwefazi.pdfIn PDF document text
    • http://finuxezanasa.mygamesonline.org/93369017960.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/ruzumeb/skype_for_windows_xp_sp2_free.pdfIn PDF document text
    • http://walepoxaz.rf.gd/jaundice_types.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/film_sherlock_holmes_season_5.pdfIn PDF document text
    • http://zifasodokid.epizy.com/bamavufenepuduxoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68f4240d-6f2c-45ce-9ba2-b369ccd4b64d/97289085672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2ab9a20-6600-4a9e-bded-40330da125b1/zoom_handy_recorder_h2_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/partners_in_performance_wiki.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/94099370906.pdfIn PDF document text
    • http://dukuzuwikisos.epizy.com/56653241192.pdfIn PDF document text
    • http://pimoxonevuwewax.atwebpages.com/connect_wd_my_cloud_directly_to_computer_ethernet.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/how_can_i_learn_korean_alphabet_a_to_z.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/gramtica_inglesa_para_hispanohablantes_cambridge_gratis.pdfIn PDF document text
    • http://togugufi.epizy.com/61676537178.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/ben_10_reboot_game_psp.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/visual_basic_2010_free_download_offline_installer.pdfIn PDF document text
    • http://dafitigare.epizy.com/sony_cyber-shot_dsc-rx100_iii_price_australia.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_off0000f14b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14B 4992 bytes
SHA-256: fcbc9291466c30af15f674aa6d919215d67684ba94582bc968e8c5b3e65144b8
font_01_sfnt_off00010231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10231 11728 bytes
SHA-256: baac3da10d7b02e7fdf2ffea351a5fe51375c10e177eb76a591155118025e5f7

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