PDF malware analysis — malicious · 5d5a82d88319b2db

MALICIOUS

PDF

83.6 KB Created: 2021-09-18 16:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 873bdeb8b89275288998088c89091ccc SHA-1: 51ce6784bd29a50e681e7610513484851c54101b SHA-256: 5d5a82d88319b2db281d6200766b583c4f6ba9e2712756e88b0c63535fe78ddf

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document contains numerous external links, many of which are embedded within a link farm structure on disposable hosting, suggesting an attempt to distribute malicious content or phish for credentials. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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 https://philabc.ru/uplcv?utm_term=mega+win+casino+mod+apk PDF link annotation
- https://jagominum.com/contents/files/24657338672.pdfIn PDF document text
- https://prawobrzeze.info/userfiles/file/58325012722.pdfIn PDF document text
- https://repetitorebi.ge/userfiles/files/43825965627.pdfIn PDF document text
- http://baovethanglongmb.com/upload/files/53324261987.pdfIn PDF document text
- http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135a922058c8---buzuxejexulanategasafu.pdfIn PDF document text
- http://www.kingsmen-cmti.com/upload/files/8311132591.pdfIn PDF document text
- http://giteduguedesboires.fr/userfiles/file/44786375353.pdfIn PDF document text
- http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/a696f9ea9c0245b83c6a95ba233dcad9/73385677268.pdfIn PDF document text
- http://guchen.ru/d/files/lagobudilabana.pdfIn PDF document text
- http://floral-design-lindgens.de/userfiles/file/samegepuzasuzemu.pdfIn PDF document text
- http://factblogs.com/uploaded_files/userfiles/files/95060227377.pdfIn PDF document text
- http://razzledazzleevents.in/userfiles/file/83551540215.pdfIn PDF document text
- https://copperscrap.wasteequipment.net/ckfinder/userfiles/files/pomakexozosu.pdfIn PDF document text
- http://studiobaldizzone.com/userfiles/files/pitosomabifolagazisotup.pdfIn PDF document text
- https://mbzgogo.xyz/web/img/podborky/files/30584090053.pdfIn PDF document text
- http://wernitznigg.at/files/xevajivewun.pdfIn PDF document text
- https://unique-u.biz/images/uploads/file/93805726287.pdfIn PDF document text
- https://blnk.eu/userfiles/files/nanopiguxodobawu.pdfIn PDF document text
- https://medarbindia.org/ckfinder/userfiles/files/xapegejiriwerogo.pdfIn PDF document text
- https://bestrecycledautoparts.net/images_i/file/90600453467.pdfIn PDF document text
- http://helloslow.com/data/userfiles/files/7983922298.pdfIn PDF document text
- http://viviapalermo.com/userfiles/files/kinukufodanonuzedopujej.pdfIn PDF document text
- https://styliststudios.com/imagesTE/file/90849603850.pdfIn PDF document text
- http://onroerendgoedindex.nl/images/uploads/27585075341.pdfIn PDF document text
- 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_off0000df1a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF1A	18944 bytes
SHA-256: `c6c3afa6e88b8335dd3d07a01bf897bdc9ae46f4682e11c06dd403e1983bd7d2`
`font_01_sfnt_off00011002.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11002	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012819.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12819	10784 bytes
SHA-256: `112fac7e5a47e29703e30649eb65911c59cc0471a1f2971418ffd817311ac6b4`

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