PDF malware analysis — malicious · aaf7de62903399b2

MALICIOUS

PDF

84.3 KB Created: 2021-09-20 13:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 99556a526916019b5b53429b853eaa52 SHA-1: 6aebc314c82db2a03977e6feb318bbf68b549e54 SHA-256: aaf7de62903399b2398f631d655b2674b8534f09485d726d264b395b6f06be4a

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, many of which are hosted on compromised websites or disposable domains, suggesting a phishing or malware distribution attempt. The presence of a link farm and a lure related to 'grand theft auto v download' indicates an effort to trick users into clicking malicious links. The embedded JavaScript likely facilitates the redirection or download process.

Machine Learning

Nyx PDF Classifier malicious score 0.9940

Heuristics 7

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.
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 https://infrive.ru/uplcv?utm_term=grand+theft+auto+v+download+android+pc PDF link annotation
- https://www.algeos.com/js/ckfinder/userfiles/files/tezuba.pdfIn PDF document text
- http://85560891.com/upfolder/e/files/20210906045257.pdfIn PDF document text
- https://butagallery.com/userfiles/files/91349521801.pdfIn PDF document text
- https://gullyracing.it/admin/ckfinder/userfiles/files/mititazajexatesapisa.pdfIn PDF document text
- https://successalpha.team/upload/files/15407415417.pdfIn PDF document text
- http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613d39e19d539---4346122690.pdfIn PDF document text
- http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1f1c9072c---43184566516.pdfIn PDF document text
- http://ydchem.cn/filespath/files/20210920075115.pdfIn PDF document text
- http://oipipleszno.pl/userfiles/file/6574766737.pdfIn PDF document text
- http://avandcie-energy.com/ckfinder/userfiles/files/3163186738.pdfIn PDF document text
- https://samirkumarpaul.com/ckfinder/userfiles/files/namexaburadekuwovirud.pdfIn PDF document text
- https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/161365b0b199f7---tanet.pdfIn PDF document text
- http://ipllaser.in/uploads/54756300710.pdfIn PDF document text
- http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/lemologopamuvawejoxidix.pdfIn PDF document text
- http://primethailand.com/ckfinder/userfiles/files/vufixepilumulemakejel.pdfIn PDF document text
- http://balalajka.nu/media/vodunowa.pdfIn PDF document text
- https://alnahamgroup.com/userfiles/file/72361831996.pdfIn PDF document text
- http://kozszemle.hu/uploads/files/sipozogufogokirerekex.pdfIn PDF document text
- http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136fc1512d03---fimot.pdfIn PDF document text
- http://globomax.eu/userfiles/file/jezezojidapuked.pdfIn PDF document text
- https://www.adoz.cz/ckfinder/userfiles/files/doganawavazakivegaza.pdfIn PDF document text
- http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613da2cda79da---53231979299.pdfIn PDF document text
- http://surausa.com/uploads/files/xazoxewape.pdfIn PDF document text
- http://bunny888.com/ckfinder/userfiles/files/xojerupop.pdfIn PDF document text
- http://kocavietnam.com/upload/files/seduzedax.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_off0000e5aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5AA	10840 bytes
SHA-256: `93707508af1cdfe5656e7c3202e9e9ba7aa1d5ba0cdb72e029707b80c08eb22d`
`font_01_sfnt_off0000fea2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEA2	17456 bytes
SHA-256: `4f920513813e1a9e25b54cfb167893d545de6f00d0d03770065f0d1dbfb4d137`
`font_02_sfnt_off00012b80.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B80	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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