PDF malware analysis — malicious · 69253307e82d225d

MALICIOUS

PDF

84.5 KB Created: 2021-09-13 16:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: dcbcb96f73b107292d6481df3c30aff2 SHA-1: 764bfa6905b20b40282587b4a4384ec6c9ee7084 SHA-256: 69253307e82d225d57d9f912c821dc1a755212fcd3bf8840583cec7d2b8e4624

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to other PDF files on distinct, potentially disposable domains, indicating a link farm designed to distribute malicious content or phish users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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.
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 http://njboyuanchem.com/upload/files/96270875232.pdf In PDF document text
- http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613d4724cc9b7---19101398492.pdfIn PDF document text
- http://architettosirocco.it/userfiles/files/50161015203.pdfIn PDF document text
- http://quangcaosmsgiare.com/media/ftp/file/82140466521.pdfIn PDF document text
- https://ccskin.com/geektic/files/86866129273.pdfIn PDF document text
- https://kop-trans.pl/uploads/userfiles/files/63203124753.pdfIn PDF document text
- https://propertiproperty.com/Uploads/userfiles/files/46067205515.pdfIn PDF document text
- https://fitness-sport.it/userfiles/file/84004187056.pdfIn PDF document text
- http://ueros.fr/admin/ckfinder/userfiles/files/xeburuzobubefawagivar.pdfIn PDF document text
- http://ansing.nl/userfiles/file/55722211832.pdfIn PDF document text
- https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/212a15e1f110d62e548ee7f6205da62a/xenogin.pdfIn PDF document text
- http://www.otevrenysklep.cz/ckfinder/userfiles/files/futore.pdfIn PDF document text
- http://baovevietnam-vnss.com/upload/file/57724795556.pdfIn PDF document text
- http://nationshield.ae/userfiles/files/mepiluta.pdfIn PDF document text
- https://wheelmartthailand.com/image/upload/File/94401266330.pdfIn PDF document text
- https://kodcomputers.ro/2664/uploads/gevirifafuwesudupuj.pdfIn PDF document text
- http://parcroyale.hk/userfiles/fizulatigaredejos.pdfIn PDF document text
- http://2990592.ru/ckfinder/userfiles/files/bodewumiboruti.pdfIn PDF document text
- https://abcoegypt.com/userfiles/files/4404781604.pdfIn PDF document text
- http://wxmx.cn/upload/ckimg/files/202109101224119291.pdfIn PDF document text
- https://pensiuneaselina.ro/userfiles/file/74444198083.pdfIn PDF document text
- http://easyreturn.store/userfiles/file/wunevubekavudalejobukoma.pdfIn PDF document text
- https://knoxvilleremembers.com/media/52254706866.pdfIn PDF document text
- https://szaniterplaza.hu/ckfinder/userfiles/files/41671813531.pdfIn PDF document text
- http://patrick-jardinage.fr/ckfinder/userfiles/files/tatedafabunewawawileluxa.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=symphony+i+94+price+in+bangladeshPDF 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_off0000dfc9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDFC9	11436 bytes
SHA-256: `779fb018e675e6bc08611268559b60ab60302ea28479f77c57305be779517999`
`font_01_sfnt_off0000fa2c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA2C	19188 bytes
SHA-256: `9a6dd66e2e81c9871b9df5ac467879ace4f6d580d4966a493044c57f44477b8c`
`font_02_sfnt_off00012c2d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C2D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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