Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c20481434524b6…

MALICIOUS

PDF

83.8 KB Created: 2021-06-28 02:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 63e3d1d9d0a4aec8d21053f3e77d1c8f SHA-1: ed37f2fdaaf4f25a3abf3356f6ac469f5eddcec0 SHA-256: 32c20481434524b60b4bddeca0823189cf24bd99154ee1d3492249e9c3f43422
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content or manipulate search engine results. The presence of multiple external URIs and link farms indicates a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/mm8cvrk9sqb775jtafnjcddjap/85632065232.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/f206accb160821e9df25bca1299ae25f/26496389957.pdf
    • http://baikalspring.ru/ckfinder/userfiles/files/84457450756.pdf
    • https://euroroma-bg.org/files/file/woxidakinipela.pdf
    • http://offerseir.com/basefile/offerseircom/files/51169607854.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608875a04405f---54498646330.pdf
    • https://vegas-shop.net/uploads/files/66429696346.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a77d0069c---46689887776.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/vone1hcrhh2ej09ftgqcp3jt8i/xavemojarujimizuxo.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/lda0gpif4e9r86fc0vqntpm854/xawif.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607861b4719f6---xuxedokanaxaxetoxekomuw.pdf
    • https://marljivo.hr/userfiles/file/5265762578.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c87eb01e985---lotimatoxetapigilezila.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072b9d3ddb5a---nukuzel.pdf
    • http://kunjipsc.com/uploads/files/vedegaxijuwenagabalula.pdf
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0529/ecf44cf76698f1516e5e32f4dcf62967.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/4b31e38ce6983fa5318cd8158e95dc9e/59123050333.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/42f0d3ae3ae4b34bbb38fe372c6c39cc/jedemukelebatiriziti.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b2e9da56b---vodafubejitezelunij.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/n77uolshspp261ck58acsgo897/talinumapapav.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/0a763807531c82fdde56f14c78d9b22f/58648945006.pdf
    • http://df-foundry.net/d/files/gokasuxesivefirizidusoxi.pdf
    • http://pechati-piter.ru/userfiles/file/midiminubupokuzoxajamu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=intimate+meaning+in+tagalog
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e59e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE59E 16792 bytes
font_01_sfnt_off0000fdb0.bin
f27389013f52eef60667ccd6548bed17d4e27717ce7f5b0308190f5c7aa7b0a1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB0 17608 bytes
font_02_sfnt_off00012b63.bin
32311041c12607a079800c449f2168d2debe13dc70b950107ded97200c4211c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B63 10136 bytes