PDF malware analysis — malicious · fa19f12eafda6569

MALICIOUS

PDF

88.9 KB Created: 2021-09-02 23:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: b72fb6f66e461f53c82864420c5d81a9 SHA-1: ecda93446f61c50542211372f8b876318c9f4f8a SHA-256: fa19f12eafda6569679fbcd0a39c0f8c8a8081799a3144f9d80d303a0e14325f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, with numerous embedded URLs pointing to potentially compromised or disposable hosting sites. While no scripts were extracted, the structure and URL patterns suggest it's designed to lure users to external sites, possibly for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://drairtools.com/ckfinder/userfiles/files/245292588.pdf In PDF document text
- https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1f3ab5694---49607881398.pdfIn PDF document text
- https://chungcungoaigiao.net/uploads/files/129185868.pdfIn PDF document text
- http://romanakladatelstvi.cz/userfiles/file/93935460194.pdfIn PDF document text
- http://aqbnb.com/uploadfile/file/85916720766.pdfIn PDF document text
- http://fontanarosaserigrafia.it/userfiles/file/2621359392.pdfIn PDF document text
- http://cn-polylysine.com/d/files/dedakegibefu.pdfIn PDF document text
- http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/l52b0qcp7ip9aout7mh18vtdqb/jobozibuwaronobuxagevuki.pdfIn PDF document text
- http://bbgannualseminar.com/clients/6/60/607ac775fa755cf068047886b2bbe24d/File/xoporalofulal.pdfIn PDF document text
- http://robbes.nl/media/files/57694011447.pdfIn PDF document text
- http://robfredo.com/userfiles/file/83657723755.pdfIn PDF document text
- https://jackyrouxmethode.com/userfiles/file/lovavejugowifidiru.pdfIn PDF document text
- http://dungcumaymoc.com/Images_upload/files/fetisojamalasibedebegi.pdfIn PDF document text
- http://princeworldwide.com/multimedia/userfiles/file/piwogilegawi.pdfIn PDF document text
- https://toocapen.com/files/puropelupasodof.pdfIn PDF document text
- https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/454e458c69027016697afc17b2e26942/foguboxolabudaforirixexaf.pdfIn PDF document text
- http://inica.org/files/file///19837935094.pdfIn PDF document text
- http://www.smartlandgroup.com//ckfinder/userfiles/files/latinan.pdfIn PDF document text
- https://bcm.es/files/galeria/files/13068080034.pdfIn PDF document text
- https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/aec5b3ab0b17c5dd126bdb5d6d103dea/vokimuzin.pdfIn PDF document text
- http://riggi.ru/userfiles/file/73660687810.pdfIn PDF document text
- https://interior-mark.com/ckfinder/userfiles/files/repuzutumevuzelilanupivit.pdfIn PDF document text
- http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160825815002ae---nepox.pdfIn PDF document text
- http://fusen-es.info/yamituki-n/uploads/files/30875669326.pdfIn PDF document text
- http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/c3832d8b0e49d414253a09c8d61e6b4f/12179129649.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=iron+man%27s+ultimate+bodybuilding+encyclopedia+pdfPDF 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_off0000f6be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6BE	17088 bytes
SHA-256: `eec4c63489820b4d6d1925900983bf134af428437fa92994d6aea2c3ef45c3b9`
`font_01_sfnt_off0001232c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1232C	11304 bytes
SHA-256: `d32a2459924c65a23d53c9e6455717bab6e4e0261441178ae9ff3418a1248c0f`
`font_02_sfnt_off00013d58.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13D58	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.