Malicious PDF — malware analysis report

Static analysis result for SHA-256 baba6d29325abd88…

MALICIOUS

PDF

86.0 KB Created: 2021-06-30 22:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 632d6a99028e5d7191bb6ba78fbf413d SHA-1: 436e97aea45b366f5937995fe0240383616610b4 SHA-256: baba6d29325abd886abdba65fff0f79060358162ad62ee06c71c64d99b747509
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV and an ML classifier. Heuristics indicate it functions as a link farm, with multiple URLs pointing to compromised WordPress sites. These links likely serve as a lure to redirect users to malicious or phishing content, a common tactic for initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/c4d095442909e6c1641afd46980ee19a/kakavelalujuzaxipip.pdf In PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c88304d006---sodezovutefitopom.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f48c26c96---75566946651.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/f37b3510186cf434cf7dd7b8b10d6c1e/serunilitilunedaroziguxak.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/1648e8d31a415a6d7922e66370cddc2f/jiwifulagaganetepufatifi.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160824d1c51c36---kuzizavujarififek.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a2733f10386---31865449829.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/f00a37fc39089dadd3e39e7ed2bd716b/71467535085.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c302bc6a86---mapipuzujuvar.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/5289883440.pdfIn PDF document text
    • http://fitviewer.de/files/file/gegakizesugajixa.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b9734b90d---83251930413.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086437555f05---lonamepif.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/fexedasidiraluj.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/f15aad1e54be7aabc34bc3981930af9e/kelaforugoliworewonupop.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/3ocdsm7s0fk0dhseiv06g2oviq/velapawemamepukinu.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819ff6e43a9---2379089275.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/28482abd7a052ad8c11ba25632ac6a2b/lajelekipotimejoluzudodam.pdfIn PDF document text
    • http://geose.ru/userfiles/file/97556278052.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/16089532fb133f---riwusovebod.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/87973340379.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/9hde7henepbfj5ug384pe10dm1/12298482796.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c96ea179dcb---tivujeriguge.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/50842673667.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/3258280747.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=traction+and+rolling+stock+jobsPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2E 10736 bytes
SHA-256: e7ee6e27b5d622321b44d3ed220b07a96f3af01e7859ce36e9082748df27af96
font_01_sfnt_off000104ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCC 16936 bytes
SHA-256: af13ab6f374e61160b6388d47746133e2a85e0fb3fe4e250fbc6e22a4d5ee0f5