PDF malware analysis — malicious · debd5b85f9658a91

MALICIOUS

PDF

74.4 KB Created: 2021-09-13 04:38:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 05c244cfeb5c9c0bc0795b432975cd98 SHA-1: c2b44daec1a3b28a6b73fab008fa0db6dcdded64 SHA-256: debd5b85f9658a91da57dbed8828ddb81c450d0bed44d168d5c51cbcd2245657

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains urgency lures and embeds numerous URLs, suggesting a phishing attempt to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF format and embedded URLs are consistent with techniques used to deliver second-stage payloads or lead users to credential harvesting pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

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
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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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=profile+photo+viewer+for+instagram PDF link annotation
- http://showdoimovel.com/files/files/29365402607.pdfIn PDF document text
- https://ajwatravel.com/wheelmarine/userfiles/file/davokisatemozijaxulisad.pdfIn PDF document text
- https://yarpaket.ru/userfiles/file/tekini.pdfIn PDF document text
- https://hebatkeren88.com/contents/files/59495054724.pdfIn PDF document text
- http://halaljones.com/uploads/files/66641593899.pdfIn PDF document text
- http://tbff-bygg.se/img/files/dofekopipamevadaji.pdfIn PDF document text
- http://konemara.hu/userfiles/file/38886380217.pdfIn PDF document text
- http://skncn.com/u/files/vitulidabim.pdfIn PDF document text
- http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1613e84e16a4dd---libeme.pdfIn PDF document text
- https://fairtradeportal.pl/userfiles/file/56143901775.pdfIn PDF document text
- http://abogarestudio.com/userfiles/file/69798932526.pdfIn PDF document text
- http://seoaudytor.pl/userfiles/file/47779373850.pdfIn PDF document text
- http://duoctruongxuan.vn/userfiles/image/file/fijoramuwex.pdfIn PDF document text
- http://uforoi.com/app/webroot/uploads/files/siwonepazowobomuvop.pdfIn PDF document text
- https://at2-turbo-j3t.com/contents/files/16286290929.pdfIn PDF document text
- https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/63e85746f04c07faf98f43582add6e90/wulinitakiwopo.pdfIn PDF document text
- http://xhiehchin.com/Xhieh_News/_file/pabejopijabazeworir.pdfIn PDF document text
- https://safecampus.in/cmsCart/upload/file/dunifusisavomo.pdfIn PDF document text
- https://alkathirilaw.com/userfiles/files/80337255382.pdfIn PDF document text
- http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/wonozodupemivusixaganojus.pdfIn PDF document text
- https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16133a5970eca7---sojurixekuzixuzawaz.pdfIn PDF document text
- https://ncltandatbar.com/home/ncltandat/public_html/dowalumniusa/ckfinder/userfiles/files/72957135297.pdfIn PDF document text
- http://slenderclub.cz/ckfinder/userfiles/files/75098270349.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_off0000bf6f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBF6F	10956 bytes
SHA-256: `9248c68edff1b96aae9502137ea70cec405a090c7b506e7a18c17eea04173f40`
`font_01_sfnt_off0000d8b1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD8B1	16708 bytes
SHA-256: `33f51d2e88a65a805183be1d350dec6608dce81647107524de6a259b1d971a3f`
`font_02_sfnt_off000103b5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103B5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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