PDF malware analysis — malicious · e27897b96ea73198

MALICIOUS

PDF

80.8 KB Created: 2021-09-15 21:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 3f90ceec08a3fb73db92c0bca08cd9a4 SHA-1: eb922441a20c74af6a4fde380fed55d1324186e1 SHA-256: e27897b96ea73198de3b146d89aed625b9bb78687b00c9434df57f7d0a7eeff8

176 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of link farms hosted on potentially compromised or disposable domains, suggesting an attempt to distribute malicious content or phish for information. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing. While no scripts were directly extracted, the presence of PDF-specific heuristics and numerous external links points towards a malicious document designed for social engineering.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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://cructi.ru/uplcv?utm_term=tiktok+account+hack+apk+download PDF link annotation
- https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/laropibevatirofobiv.pdfIn PDF document text
- http://nikkenj.com/userfiles/file/2214644928.pdfIn PDF document text
- http://grandfiltr.com/files/file/15085624599.pdfIn PDF document text
- http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161411c7e61eee---nuxugazirizabirobunakuj.pdfIn PDF document text
- http://mrpokedb.com/uploads/files/fopiteraxadexofexateder.pdfIn PDF document text
- https://channeloflove.com/ckfinder/userfiles/files/97452504896.pdfIn PDF document text
- http://ccsilver.kr/files/fckeditor/file/15204158636133251810e36.pdfIn PDF document text
- http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd65628827---99369122618.pdfIn PDF document text
- http://medtravel.lv/images/hand_uploaded/files/80444565461.pdfIn PDF document text
- http://www.ags-sib.ru/ckfinder/userfiles/files/20368469262.pdfIn PDF document text
- https://sieuthimaycafe.vn/uploads/file/18499471784.pdfIn PDF document text
- http://seibyou-koujien.com/files/files/33787978751.pdfIn PDF document text
- https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132f4221a9a0---nasuzibesimededorutadi.pdfIn PDF document text
- http://unionnutritech.com/upload/files/jomixabaselu.pdfIn PDF document text
- https://drddvichitra.com/userfiles/file/11191603444.pdfIn PDF document text
- https://inprovitpuertorico.com/ckfinder/userfiles/files/lesaviza.pdfIn PDF document text
- https://zoldlepes.hu/userfiles/file/fatejur.pdfIn PDF document text
- https://beautydent.hu/editor_up/1366191393.pdfIn PDF document text
- http://myjobcareer.net/userfiles/file/2021090512081773499.pdfIn PDF document text
- http://heaig.org/editor/ckfinder/userfiles/files/50854906284.pdfIn PDF document text
- http://greatwalledmond.com/ckfinder/userfiles/files/xonolod.pdfIn PDF document text
- https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16135220c8eb9d---6530164262.pdfIn PDF document text
- https://braintreeclinics.com/app/webroot/img/files/13358429601.pdfIn PDF document text
- https://abrasco.org.br/ckfinder/userfiles/files/4931920862.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_off0000d791.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD791	10452 bytes
SHA-256: `f4f56ebf538d5b6dbd0becf9a3221579b0b7b8fed431e5d62a5c1957cee6f8af`
`font_01_sfnt_off0000ef49.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF49	18140 bytes
SHA-256: `92f882eb4a14faeb469c3acda46d7734ab7cba66fc90dcbbe615b72a6004d613`
`font_02_sfnt_off00011e1b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E1B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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