PDF malware analysis — malicious · 452c75174f1428ae

MALICIOUS

PDF

89.0 KB Created: 2021-06-25 23:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: ddb551e7f7263c7fa129171d795af6a8 SHA-1: 9b8377be4c4710db0db6a8b312f785b26f8d2e9a SHA-256: 452c75174f1428aedcf30944da19cc9ed611ca49d70530269cb7da53e3a6054a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many of which point to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the structure indicates a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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 http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b788c03a03f---85417461007.pdf In PDF document text
- http://shinies.ru/img/lib/file/goxakiralixoso.pdfIn PDF document text
- https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078f2cc75b4e---1930738501.pdfIn PDF document text
- http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/c35b0b567719662e5012cd806e1637c4/newawarufikobojevugenofo.pdfIn PDF document text
- http://greece-ex.com/images/blog//file/wowidovisukogizap.pdfIn PDF document text
- https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/1aba9c6916208ec861f511f03f354f26/tewivopexukesurugaxuguli.pdfIn PDF document text
- https://smartmedia.ro/app/webroot/files/userfiles/files/6805148869.pdfIn PDF document text
- http://strahovka66.ru/userfiles/file/88575673715.pdfIn PDF document text
- https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/6f9536910a5bd7a5e3d160f0e63f2c47/30172627127.pdfIn PDF document text
- http://casaalu.com/luutru/files/36926691455.pdfIn PDF document text
- http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c96f15234f7---28842833121.pdfIn PDF document text
- https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757a8f0c067---vatewute.pdfIn PDF document text
- https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/m8g8j6ueqktnn1gtv7frg1s6s1/konugegowitidugubibu.pdfIn PDF document text
- http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa015634e3---27984679770.pdfIn PDF document text
- http://omgmediatank.com/userfiles/files/bimedum.pdfIn PDF document text
- https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cce6fdc610---neruwafelezogep.pdfIn PDF document text
- http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ca0267380---50508497820.pdfIn PDF document text
- https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac23033528f---59179379944.pdfIn PDF document text
- https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/27d91a4976b8f3001ee1451a2a2a32ae/fuxofamokinedovowozogajuw.pdfIn PDF document text
- https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/311db90ede5b4eb89c0bc33e0664b0e1/82694044426.pdfIn PDF document text
- https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/595e641840a195b036c57a0a3ede6f8f/27236362546.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160c0be8323a08---pasobavufapuwosejisajivit.pdfIn PDF document text
- http://sutphinsgermanshepherds.com/clients/21958/File/teziwop.pdfIn PDF document text
- http://lt101shop.com/userfiles/files/kezunujoko.pdfIn PDF document text
- http://winecellarkeeper.com/ckfinder/userfiles/files/repikiridobaxawowewezomu.pdfIn PDF document text
- https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/4740109eaee011990b8390ad8c753990/70982323026.pdfIn PDF document text
- http://afgventuregroup.com/cfiles/file/15466659544.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+make+paper+tear+effect+in+photoshopPDF 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_off0000f6c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6C7	17104 bytes
SHA-256: `d54c1694efdb5273467e4ae755c016f49994eafc79101f2da5053343f5e5ac22`
`font_01_sfnt_off00012394.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12394	10868 bytes
SHA-256: `10449a40fafadaa1b64f89ab05542fb827c3e8f1b6d52ab4c22d1c87833906d3`
`font_02_sfnt_off00013c87.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13C87	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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