PDF malware analysis — malicious · d2cf870ee6f20b4e

MALICIOUS

PDF

88.1 KB Created: 2021-10-23 17:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: 022e6f54adfb1f1f177bfecaae3a0b19 SHA-1: 37098fde07e4358737ae16eec9f14f0904dbbe0a SHA-256: d2cf870ee6f20b4e975b4d32c9b64320c16578a54ff2d82fc143ce5fa562458a

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to numerous domains, several of which are identified as potentially compromised CMS uploads or hosted on disposable domains. The ClamAV heuristic specifically flags this as 'Pdf.Phishing.Trojan', indicating a malicious intent to deceive users. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or further malware delivery.

Machine Learning

Nyx PDF Classifier clean score 0.0242

Heuristics 5

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
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://jobsandhi.com/uploaded_files/userfiles/files/pewivasosekatifizu.pdf In PDF document text
- http://jyjwqj.com/uploadfile/file///2021091517492885.pdfIn PDF document text
- http://tuivaivietnam.com/uploads/files/54884489990.pdfIn PDF document text
- http://chaukitchen.com/uploads/files/16782653334.pdfIn PDF document text
- http://sooam.com/files/fckeditor/file/64908454061730945c7343.pdfIn PDF document text
- http://kenshopvn.com/uploads/files/zubasotavobadugipiwag.pdfIn PDF document text
- https://coolinterier.sk/upload/files/22478321488.pdfIn PDF document text
- https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/1dd6763c2045ce38d7d5cc6cc8094864/54318631164.pdfIn PDF document text
- http://metafelix.it/userfiles/files/53887924715.pdfIn PDF document text
- https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/c8ab52a4e653adf70c6c44149c872571/86976407225.pdfIn PDF document text
- http://factorycontrolprojects.com/userfiles/file/44171669597.pdfIn PDF document text
- http://petra-koparki.pl/Upload/file/xujuxivusolep.pdfIn PDF document text
- http://simsvizag.com/admin/uploadedfiles/file///xukuzagaxorividuso.pdfIn PDF document text
- http://canadanur.com/resimler/files/sivaban.pdfIn PDF document text
- https://quimicasorocolor.com.ve/ckfinder/userfiles/files/kibigoronefopavofif.pdfIn PDF document text
- http://italy-ex.com/images/blog/file/50255936487.pdfIn PDF document text
- http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/dq3c1bnm035nl37mklv2tfimvm/45657330462.pdfIn PDF document text
- https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615f04d9263b0---54180910292.pdfIn PDF document text
- https://vsetinrally.cz/userfiles/file/tatupozefexoraroxivupik.pdfIn PDF document text
- http://naosgym.com/userfiles/files/kixopovanutogusozuj.pdfIn PDF document text
- http://tandprotheses.com/ckfinder/userfiles/files/98399087592.pdfIn PDF document text
- https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1616d125b1d22e---didod.pdfIn PDF document text
- http://bakefruit.com/uploads/files/202110180819285193.pdfIn PDF document text
- https://cebubigsellers.com/userfiles/file/kovudavilogixajem.pdfIn PDF document text
- http://feedproxy.google.com/~r/MbOu/~3/BGAemAmcdTc/uplcv?utm_term=labour+pain+dua+for+easy+deliveryPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_005_off00013e0c.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x13E0C	18724 bytes
SHA-256: `73465cefd716a9b96d41c99d60f8750691ba201099e1e7e72ef1f471911f4f4e`
`font_00_sfnt_off0000db2e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB2E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f345.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF345	10772 bytes
SHA-256: `a55872dd002e5df8344821b463353c6cbe6748e25a4ce4bc1d5dc17267c42053`
`font_02_sfnt_off00010bf0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BF0	19364 bytes
SHA-256: `2d8d317413e2aeb6b5a1778a8a74d5e63d3f181d42631fcec60676aed6dc028f`

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