PDF malware analysis — malicious · f7de4a41dd14f8f3

MALICIOUS

PDF

83.1 KB Created: 2021-09-24 03:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: fb5d4a3977cf040120c55370622e6595 SHA-1: 7dca8c8d1f4ec20df23dcd6f53c02ba4e269650e SHA-256: f7de4a41dd14f8f3dbd432e4642761ec588186c0646fd3879cc250edd39114d3

134 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. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting an attempt to host or redirect to malicious content. The presence of these URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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
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 http://dobrejaja.com/Upload/file/zuxozajofaxanovosebe.pdf In PDF document text
- http://jubangh.com/Upload/FckUpload/20210923file///rosutenomusinedatutisuki.pdfIn PDF document text
- http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zasowewibevowires.pdfIn PDF document text
- https://guapa2.com/admin/fck/file/50932984138.pdfIn PDF document text
- https://unitedpetexpress.unitedreloth.com/ckfinder/userfiles/files/mamoropixegituposonetinad.pdfIn PDF document text
- https://wasael.com/userfiles/file/mudoxeza.pdfIn PDF document text
- http://ormansagszive.hu/upload/file/mavoxuvujategufadeba.pdfIn PDF document text
- http://kartinatv.org/uploads/files/mujidisali.pdfIn PDF document text
- http://runbo.net/upfiles/files/16324332871263.pdfIn PDF document text
- http://feg.vn/uploads/files/29998521809.pdfIn PDF document text
- https://amzentransportationindustries.com/admin/imagetemp1/file/98360210250.pdfIn PDF document text
- http://hotechike.com/files/files/tikagutegojezuvisetizonud.pdfIn PDF document text
- http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161476a675af15---duxasukev.pdfIn PDF document text
- http://fivelscope.net/fckimages/gegamatisotisup.pdfIn PDF document text
- http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16145dac9c8ba9---22579009078.pdfIn PDF document text
- https://padservhosting.com/userfiles/file/kalajetobafeseboxatira.pdfIn PDF document text
- http://pusancard.com/userData/board/file/59928398108.pdfIn PDF document text
- http://ayurveda-shiatsu-nice.com/upload/files/74240972498.pdfIn PDF document text
- https://rubfila.in/files/file/wejavigofawunamujiso.pdfIn PDF document text
- http://www.sospapa24.com/lib/ckfinder/imgupload/files/65923682126.pdfIn PDF document text
- http://honghuibio.com/d/files/47208264329.pdfIn PDF document text
- http://madmojo.com/fckupload/file/21494664024.pdfIn PDF document text
- http://mirgalosh.moscowfashion.net/content/xuploadimages/file/lufugedupojanejofiluriv.pdfIn PDF document text
- http://tokado.ua/media/file/45438126816.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=step+counter+on+androidPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dbd3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBD3	10468 bytes
SHA-256: `d45864bc3b263e2c6cee81e425a9a4718c86d19b5792514d82e51b91b8458648`
`font_01_sfnt_off0000f3ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3AC	19488 bytes
SHA-256: `5b868e71a0d7b9100f0c05d1e6b79bed31d710158fd85463dec125a5469ba047`
`font_02_sfnt_off000126ba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x126BA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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