PDF malware analysis — malicious · 7fefdde7013ad116

MALICIOUS

PDF

88.4 KB Created: 2021-09-17 04:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: d471299bb93ab0b31f9986565380bc68 SHA-1: 95a548340ddbb6b377c4153fbb23fb034a4370d4 SHA-256: 7fefdde7013ad116856b3db6a7f53d0cf8928b619076256177d3c79b90c2b525

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains a large number of embedded URLs, many of which point to disposable hosting, suggesting a link farm or phishing lure. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this. No scripts were extracted, but the overall structure and heuristics point to a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9964

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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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://wastran.ru/uplcv?utm_term=iphone+not+receiving+images+from+android PDF link annotation
- https://stayinbranson.com/ckfinder/triplebuserfiles/file/zonaxulizebizufigafebogi.pdfIn PDF document text
- http://lexuspolymers.com/assets/ckfinder/userfiles/files/kovikezejarezikadaxipujap.pdfIn PDF document text
- http://sinorarechem.com/upload/files/51884215664.pdfIn PDF document text
- http://cambridgekapurthala.com/damana/userfiles/file/lurelesovamakigilez.pdfIn PDF document text
- https://marathonlaval.com/userfiles/files/99996012044.pdfIn PDF document text
- http://ndc-group.ru/uploads/files/14466567842.pdfIn PDF document text
- http://tiwtactic.com/userfiles/files/muvunejim.pdfIn PDF document text
- https://milorem-service.ru/userfiles/file/witusikubunuxiw.pdfIn PDF document text
- http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/juxolofazagegaweba.pdfIn PDF document text
- http://bkdesign.ee/userfiles/file/suzikujajiredijugux.pdfIn PDF document text
- http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16132ca64868f4---lamegofifedabube.pdfIn PDF document text
- http://www.ktgroup.co.uk/ckfinder/userfiles/files/88724399457.pdfIn PDF document text
- http://domadoma.cz/userfiles/file/zekogexisuralax.pdfIn PDF document text
- https://weboonline.com/ckfinder/userfiles/files/maweregita.pdfIn PDF document text
- http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/33703764094.pdfIn PDF document text
- https://ferropula.hr/files/78554009660.pdfIn PDF document text
- http://0228339500.kad.tw/kads/ckfinder/userfiles/files/fikozu.pdfIn PDF document text
- http://studioaba.net/userfiles/files/zozibopukipasafusamejife.pdfIn PDF document text
- http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/56710010449.pdfIn PDF document text
- http://etnorom.hu/pictures/rerigudumil.pdfIn PDF document text
- https://booknowrentalimo.ch/userfiles/files/25620794494.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d994.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD994	17716 bytes
SHA-256: `203e13f0a784d11504ccad725d66bcc8b9bf07508b441dcca79853369ffd3fed`
`font_01_sfnt_off0000f481.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF481	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010c93.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C93	17620 bytes
SHA-256: `00b53aafbc7781455e52c1cd785665ca2cd5ce578069fef41d79a31ee804e533`
`font_03_sfnt_off000139fd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x139FD	11036 bytes
SHA-256: `0c79cd87e80b8e434d97ec8b9be6eef335c12abab4846655c05fd2f3db7578af`

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