PDF malware analysis — malicious · 233b073bd341df8e

MALICIOUS

PDF

66.3 KB Created: 2021-09-28 00:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: b007650b581925fbb46c69efed17d187 SHA-1: a1c97dec45211242d3381de73fce8970e8198402 SHA-256: 233b073bd341df8e33a32bc1c28393ad35c9a28f63cfc1a43b2f4b88b31e5ed9

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and heuristic firings strongly suggest this PDF is used for phishing or malware distribution. No scripts were extracted, but the presence of numerous external links is the primary indicator of malicious intent.

Machine Learning

Nyx PDF Classifier suspicious score 0.4735

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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://allytemp.ru/uplcv?utm_term=marvel+spider+man+android PDF link annotation
- http://szkolaprywatnaleszno.pl/userfiles/file/47453838178.pdfIn PDF document text
- http://usaoxin.com/userfiles/2021-9/file/vasezifililozarosanufomej.pdfIn PDF document text
- https://luckysurface.itweald.com/uploads/files/613e4600c762f.pdfIn PDF document text
- http://daehnfeldt.com/userfiles/file/69502046343.pdfIn PDF document text
- https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/36cdb9d5179f106d35e87a2f1a278073/27017030377.pdfIn PDF document text
- https://angel-juicer.com/FileData/ckfinder/files/20210928_2F87828692676C6F.pdfIn PDF document text
- http://otpetye.com/images/shared/file/lenupamujixepad.pdfIn PDF document text
- https://licorne-hotel-restaurant.com/userfiles/file/96281694229.pdfIn PDF document text
- https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/f798177607682e62ffe2111b45039656/310801002.pdfIn PDF document text
- http://darangyi.com/userData/board/file/lotazizamuzudazimuwe.pdfIn PDF document text
- http://severstroysnab.ru/userfiles/file/kevasivazafo.pdfIn PDF document text
- https://padservhosting.com/userfiles/file/62860134842.pdfIn PDF document text
- https://ksuskalology.com/images/file/19061189504.pdfIn PDF document text
- http://davidhammerstein.org/ckfinder/userfiles/files/6970346103.pdfIn PDF document text
- https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/khr5tv2se9rck2orcvao1gbb1k/tusulirekixiga.pdfIn PDF document text
- https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/da275254a05e7b02f737703cbb3233fb/88924599027.pdfIn PDF document text
- https://riolospettacoli.it/filesUploads/file/mimepimalinenijov.pdfIn PDF document text
- http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144b18ceb864---16341397954.pdfIn PDF document text
- http://geasit.it/userfiles/files/mopov.pdfIn PDF document text
- http://rebeccaosborne.com/uploads/72696838309.pdfIn PDF document text
- http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161415a3d6d792---sogupepobenujasag.pdfIn PDF document text
- https://www.suep.gr/ckfinder/userfiles/files/4701403746.pdfIn PDF document text
- http://k2plusinterior.com/userfiles/9468553678.pdfIn 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_off0000b01c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB01C	10512 bytes
SHA-256: `e3b86d621ce2d50d7d97af44d0a99f7cb85335cb4f96da3ba3dd4131bf3a87aa`
`font_01_sfnt_off0000c7f2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC7F2	16396 bytes
SHA-256: `90495026a3efd6d8a20f1dbee3383699b47491e8cd0e8e0e9dd14da23fd3a1ea`
`font_02_sfnt_off0000f1bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1BF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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