Malicious PDF — malware analysis report

Static analysis result for SHA-256 04abc6232be9ffe7…

MALICIOUS

PDF

81.7 KB Created: 2021-03-27 19:08:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ac33cca089a7420323010a768c7a534 SHA-1: eb3a30211448f0103bd93412b8f0afe1ff6025b3 SHA-256: 04abc6232be9ffe70279f1ef029861bf2ff604a71b07161bbdb7e275e0495a24
134 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of multiple external URIs, including those on disposable hosting, suggests a phishing or malware distribution scheme. The heuristic 'SE_URGENCY_LURE' indicates the document likely uses deceptive language to prompt user interaction with these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=country+fake+book+pdf
    • http://sevagawos.getenjoyment.net/64433445527.pdf
    • http://tafiwon.mywebcommunity.org/someone_like_you_adele_piano_chords_easy.pdf
    • https://cdn-cms.f-static.net/uploads/4501632/normal_602c31bfd9fe5.pdf
    • https://static.s123-cdn-static.com/uploads/4452837/normal_5ff4e00758746.pdf
    • http://xufuxenu.mypressonline.com/jitefij.pdf
    • http://fekowepiz.mywebcommunity.org/59922707299.pdf
    • https://cdn-cms.f-static.net/uploads/4495391/normal_5fd35123574ad.pdf
    • https://cdn-cms.f-static.net/uploads/4368998/normal_605b97eb3de72.pdf
    • http://axecheat9.xyz/wusukenatodamuputorhsh67.pdf
    • http://bestplacefor.rest/7992019886u1h9g.pdf
    • http://ejqy.com/what_is_the_poorest_place_on_earth2q7tf.pdf
    • https://cdn-cms.f-static.net/uploads/4490949/normal_5fda085cd2602.pdf
    • http://soldonlakewood.com/formula_para_volumen_de_prisma_octagonale1dso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zulezov/sagitubuwetilogikapuba.pdf
    • https://s3.amazonaws.com/liwafo/giralomakosul.pdf
    • https://s3.amazonaws.com/davolazupivowi/xunegugabetobogisuxod.pdf
    • http://muzulozak.atwebpages.com/30059576638.pdf
    • https://uploads.strikinglycdn.com/files/60a7a9aa-d267-40a8-af0d-5e06cd967791/28576518579.pdf
    • https://s3.amazonaws.com/senodiw/counter_strike_1._6_zombie_servers_free.pdf
    • https://uploads.strikinglycdn.com/files/b214c6d1-8894-445e-83ac-d9bba9ca6a7b/zuzadujemutilijewixaw.pdf
    • https://uploads.strikinglycdn.com/files/446d10c6-a939-4e50-a3ce-d5b64322aa5e/how_to_do_multiple_math_functions_in_excel.pdf
    • http://bodegifu.atwebpages.com/nigurazulixonafovizuji.pdf
    • https://uploads.strikinglycdn.com/files/794838af-3f41-4332-8fb5-4b6d658c5006/japajitusetuzawadag.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_off0001029e.bin
3c11bd45fea13eb92cb23637b65d0fa4fc53b6b25fe78bd881d144494c1d8201		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1029E 5036 bytes
font_01_sfnt_off000113d5.bin
8782f6161afcb3739d26235a9fb75759587488eabb74da42a36d332f71739118		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113D5 10660 bytes

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