Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2d09a82588b976…

MALICIOUS

PDF

90.1 KB Created: 2021-07-03 15:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4dd61f4d1d0d41e2722daea66cb49344 SHA-1: b1df2bf247fa5a86343c4704e46ff039bb0e9ecb SHA-256: 9a2d09a82588b976a4064a82ab1484c625a303943e82432adc62227fa26bc3f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://ksboutlet.com/file/files/dejilazajupozo.pdf In PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089589a53024---80343257282.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/9146393540.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/75pn5jtgoqidt3t71ntapl79kt/85127877473.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/wokoka.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/4869474866.pdfIn PDF document text
    • http://www.asslar.de/downloads/xinarijamurojawupigi.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/sudem.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5db7375e9---3445293263.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/56fe32aba15018d044a55708588acf32/68924280745.pdfIn PDF document text
    • http://msiutilities.biz/documents/65253208042.pdfIn PDF document text
    • http://katheran.com/clients/55933/File/tevukotakaxiwijopus.pdfIn PDF document text
    • http://elitvorota.ru/f/file/gerupolosuxonajesimuxox.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160917b2d55ab8---fipisuxifakiravujijape.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/701e1a6e9fd0c73dc476f2bd7f6c2af2/12642557193.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d945708f9f2---gajesuwagovopepebeza.pdfIn PDF document text
    • https://marblo.com/app/webroot/img/files/11522913875.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160734e66a9e87---63604634399.pdfIn PDF document text
    • https://whitesal.com/data/images/file/4247_20210612181256.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/sapop.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160710f25684cd---tofitesemim.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609046321211b---15565935817.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/ruxina.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/parawuvo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=meaning+of+repentance+in+the+biblePDF 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_off0000fdcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCD 16724 bytes
SHA-256: 809bef2cae7a604d771b225d030c6fce879fc651693260674fff1f4fb35fd94c
font_01_sfnt_off0001291a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1291A 10724 bytes
SHA-256: 37f1629eaab14effa47f5772201f8f5d9d7947c72401580f88490239b75562a0
font_02_sfnt_off0001416a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1416A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1