PDF malware analysis — malicious · daf11a60af516e2d

MALICIOUS

PDF

80.4 KB Created: 2021-09-11 00:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23

MD5: 6883e1b045e261b27893b478bf383e80 SHA-1: fde3cf78230d0ab2c83cb6089eba64c83450b62e SHA-256: daf11a60af516e2d8003cb2b006f265bb2e96417820e7292841600069c690a14

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://elosc.com/upFile/file///ITX202109051311345442.pdf In PDF document text
- https://tapetcenter.ro/app/webroot/files/userfiles/files/xuzubilo.pdfIn PDF document text
- https://rajakeempat.com/contents/files/79910054499.pdfIn PDF document text
- http://quimis.net/js/ckfinder/userfiles/files/43169685589.pdfIn PDF document text
- http://pijntherapie.be/uploads/files/77406609231.pdfIn PDF document text
- http://dunakeszi.varosom.hu/userfiles/files/95342380711.pdfIn PDF document text
- https://maintogelonline2.bet/contents/files/48637984223.pdfIn PDF document text
- https://cingenito.ca/upload/editor/file/gufokufufafagekajana.pdfIn PDF document text
- http://namngonviet.vn/user-/files/fikuborukisavotawinusuka.pdfIn PDF document text
- http://moderncarrent.com/user_img/files/44879059179.pdfIn PDF document text
- http://rebornfair.com/FileData/ckfinder/files/20210910_EB77C7F4B4585C5B.pdfIn PDF document text
- https://mmrh.myagenda.cz/pictures/editor/files/35935594458.pdfIn PDF document text
- http://chafewyuok.handysociality.com/upload/files/98206393919.pdfIn PDF document text
- https://landatur.com/files/galeria/files/zokiludenure.pdfIn PDF document text
- http://ocean-ex.com/images/blog/file/53077452977.pdfIn PDF document text
- http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6ade77845---5443615169.pdfIn PDF document text
- https://goez3.com/10005001208290177/ckfinder/userfiles/files/tepesewegasejojikuxip.pdfIn PDF document text
- http://onsijsselstein.nl/userfiles/files/bazowawalutom.pdfIn PDF document text
- http://jsqnchem.com/upload/files/kikav.pdfIn PDF document text
- http://dakhoanhanai.com/images/files/bifopasuteraroperevajo.pdfIn PDF document text
- http://apothepharma.com/upload/files/29723186784.pdfIn PDF document text
- http://ugyvednok.hu/userfiles/file/bojaxabulufoxule.pdfIn PDF document text
- http://ckrestaurantgroup.com/ckfinder/userfiles/files/bojajenefiga.pdfIn PDF document text
- http://www.gieskestukadoors.nl/ckfinder/files/files/86944844954.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=stickmount+app+free+downloadPDF 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_off0000d5b6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD5B6	17220 bytes
SHA-256: `bbc3d19c46340d512ede9b8e6b8a9e4b9dcbd475e680d20e10bfcfb4f6f63f9d`
`font_01_sfnt_off00010207.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10207	10964 bytes
SHA-256: `e4b9bff55f080389ca279ef15a3f2b8170548ad97bd6b7f0efece71795e98f7a`
`font_02_sfnt_off00011b83.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B83	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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