PDF malware analysis — malicious · 2d7b910b144b0252

MALICIOUS

PDF

85.5 KB Created: 2021-09-19 02:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: abfa9a2038c0fdba9f47b448300d5292 SHA-1: 99c98dd1edefc353bddeb394b5afbabe64cfd3d9 SHA-256: 2d7b910b144b02521a5eb70b3053f4fdb2d756250c3145b0b10f2f2937ef0ab8

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. The PDF contains a large number of external URIs pointing to various domains, many of which appear to be disposable, indicating a link farm or phishing lure. The presence of embedded JavaScript, though not explicitly detailed, is a common vector for malicious PDFs to execute further actions.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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.
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://metabolit.ru/files/file/pimik.pdf In PDF document text
- https://stop-remont.ru/ckfinder/userfiles/files/fulidova.pdfIn PDF document text
- https://marathonblainville.com/userfiles/files/pumibe.pdfIn PDF document text
- http://manpukuorder.com/uploads/files/letimivenuwuvi.pdfIn PDF document text
- http://oticonshop.com/ckfinder/userfiles/files/bepumesapefat.pdfIn PDF document text
- http://studiomanzella.com/userfiles/files/pupalerusutekibupigil.pdfIn PDF document text
- https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/q2tj6lqmg67291en85u4eojftb/siganunedetinidomivav.pdfIn PDF document text
- https://bandai-k.com/userfiles/file/tetifug.pdfIn PDF document text
- https://skatrip.com/basefile/skatripcom/files/88993035272.pdfIn PDF document text
- http://heyumpnd.com/userfiles/file///liwazisoluwujop.pdfIn PDF document text
- https://askisan.com/upload/ckfinder/files/5655816085.pdfIn PDF document text
- http://grafiport.com/userfiles/file/tapagurasisosenoluzij.pdfIn PDF document text
- https://sistemkabin.com/ckfinder/userfiles/files/65387127205.pdfIn PDF document text
- http://kammatrans.com/userfiles/files/35184545249.pdfIn PDF document text
- https://unaizahic.com/Files/files/pagosuwalabupajoko.pdfIn PDF document text
- https://salwangurugram.com/files/99362023049.pdfIn PDF document text
- https://centrumschoolka.pl/photos/file/4149103512.pdfIn PDF document text
- http://cadelupo.it/userfiles/files/komiwatafojumakan.pdfIn PDF document text
- https://najlepsze-w-polsce.pl/uploads/kuzodexujalavapivepixarij.pdfIn PDF document text
- https://www.agencesramos.com/ckfinder/userfiles/files/71926293068.pdfIn PDF document text
- http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/92435301864.pdfIn PDF document text
- https://chambres-a-la-ferme-plouzelambre.fr/userfiles/file/16124311012.pdfIn PDF document text
- http://bonaparte-kerkrade.nl/fckeditor/ckfinder/userfiles/file/bubefebewitopiwuxi.pdfIn PDF document text
- http://csaladiegyteruautok.hu/userfiles/files/80148476550.pdfIn PDF document text
- http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613d58b67fe93---tagidixirelox.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+delete+files+in+internal+storage+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_off0000e895.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE895	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000100ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100AC	10608 bytes
SHA-256: `b768a9f0bf67af489b6671e6a2b6dfdcff5a8d78b7dcea2f88457666335748cb`
`font_02_sfnt_off000118ce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x118CE	18160 bytes
SHA-256: `01d6d6244e4b2a1a4b82277e7a6086bdd16a5d5b23dd6b7ecfa6482af6d905b1`

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