Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e5a5cbb1c01f37…

MALICIOUS

PDF

75.7 KB Created: 2021-03-27 20:05:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e3fc27659dc87affc27900157a4aadd0 SHA-1: 7b1a93f1406bf4cd8f3711352352acc852bda7c6 SHA-256: b8e5a5cbb1c01f37338c7e3ac74388c6c162b5bd7333871b54f8d20818fc10b4
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to movie songs and software, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jottigo.ru/123?utm_term=bandhan+movie+song++likewap PDF link annotation
    • http://baxijemapuzoxu.22web.org/4754733229.pdfIn PDF document text
    • http://detonicufficiale.website/41467841418c3548.pdfIn PDF document text
    • http://agentsecure.space/lepuzukuzov38lrf.pdfIn PDF document text
    • http://deteluwo.iblogger.org/balance_sheet_and_p_l_assertions.pdfIn PDF document text
    • http://sk-anker.ru/kosului3uav.pdfIn PDF document text
    • http://voztrans.ru/loferijuhwet.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/research_methodology_in_architecture_thesisd7wus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lisuwar.rf.gd/clash_of_clans_updated_mod_apk.pdfIn PDF document text
    • http://wijopimitiraze.epizy.com/cardiopatia_isquemica.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/kikilupakawopapisudu.pdfIn PDF document text
    • https://010f2e21-25ca-4560-806d-08cbbb7c7db1.filesusr.com/ugd/74a852_4b85fad2c7c649f2960a1d9fce851cf5.pdf?index=trueIn PDF document text
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_ade81fca6ee54178a2c490f3c492ec50.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/vusuvibiben.pdfIn PDF document text
    • http://pibowaloboko.rf.gd/rurubepow.pdfIn PDF document text
    • http://suwifubol.epizy.com/a_thousand_splendid_suns_symbols_and_motifs.pdfIn PDF document text
    • http://biviroromu.rf.gd/how_to_become_a_successful_operations_manager.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/die_casting_process_steps.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/reporter_vacancy_in_rajya_sabha.pdfIn PDF document text
    • https://e9abb47e-19e5-4ec2-9f3c-2aa4e6f2bf0a.filesusr.com/ugd/92be99_3eaa4ec4488148deb8d0dec839eb4485.pdf?index=trueIn PDF document text
    • http://wamasoz.epizy.com/body_language_tips_in_tamil.pdfIn PDF document text
    • http://lubozudaxik.epizy.com/zotekeneroso.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/auteursrechtenvrije_muziek_en.pdfIn PDF document text
    • http://zilosazalepuzu.epizy.com/wulip.pdfIn PDF document text
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_117993a742ef4945940bb1387b49aefd.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_off0000e986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE986 5540 bytes
SHA-256: 9ee7ca939392cdde2ada7f9fee74418bbe197f7ce458eda8bcd72e4ffc1473fb
font_01_sfnt_off0000fc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC52 11024 bytes
SHA-256: dfd8272431ed543e4bbcdfb0f25888039419db2a34e3916bd73b5bac1202557b

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