PDF malware analysis — malicious · 015074a7ab0baf4f

MALICIOUS

PDF

81.7 KB Created: 2021-09-02 00:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 29bcf4ff1ec2b0987fa395277c05f7f9 SHA-1: b85a4250518b6c89249ab7f0575610c925497f13 SHA-256: 015074a7ab0baf4f244514a63cd5a3c1f9dad3e69f2e497ecb977a693b9a332c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised websites and link farms, suggesting a phishing or malware distribution scheme. The presence of external URI heuristics and link farm indicators further supports this attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9987

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
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.
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://oniceh.ru/uplcv?utm_term=isbn+number+9781775810780 PDF link annotation
- https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16096f23064ef9---matusimapudovibobiwijag.pdfIn PDF document text
- http://dui-antidote.net/images/userfiles/file/sowawewunudaxixawow.pdfIn PDF document text
- http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd7f0ef6be---18655195506.pdfIn PDF document text
- https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/2f40e734298e94118333f96259965402/miwanekelikozamiri.pdfIn PDF document text
- http://abwcoliseum.com/uploads/files/46068368699.pdfIn PDF document text
- http://starwindows.ie/ckfinder/userfiles/files/99264669144.pdfIn PDF document text
- https://n-zvuk.ru/upload/file/rarezi.pdfIn PDF document text
- https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba70e6bf982---sulog.pdfIn PDF document text
- http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/37a42b0835670c420f4417041ec9bd4d/74993011360.pdfIn PDF document text
- https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d9e14ed6bbf---vuzoporozivogebenejezit.pdfIn PDF document text
- https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16073a4179a250---gogijediv.pdfIn PDF document text
- https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/gqu72rdpkgdvnuci33d14utb9u/xeketezofotezedotivona.pdfIn PDF document text
- https://vietnaminsight.biz/ckfinder/userfiles/files/sawememijanime.pdfIn PDF document text
- http://jinohair.com/upload/files/13376394665.pdfIn PDF document text
- https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082017e150f2---65267422360.pdfIn PDF document text
- http://studiotecnicoarduini.eu/userfiles/files/polin.pdfIn PDF document text
- https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/4078c8f5d2adfdb355324fc555e5e05d/98184965470.pdfIn PDF document text
- http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160919a53bb6e1---porujobetogesiragevif.pdfIn PDF document text
- http://climacom.eu/userfiles/files/619737419.pdfIn PDF document text
- http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607364e000570---34206141144.pdfIn PDF document text
- http://csc0851.com/userfiles/file/20210805131043_8lejnp.pdfIn PDF document text
- http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b1c6acd3a---90824720177.pdfIn PDF document text
- https://unaizahic.com/Files/files/47402105748.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_off0000dd05.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD05	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f51c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF51C	10676 bytes
SHA-256: `5a1e9c5d4e5bd31754a02817f6cb3b2c4e26e1a67b3ec92dd7278c370a33b55f`
`font_02_sfnt_off00010dad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DAD	16488 bytes
SHA-256: `83504dfba1f4b74474c8408262c133e12f3920d68e62e661f587c1ed10da71e9`

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