PDF malware analysis — malicious · 4e093c299830565e

MALICIOUS

PDF

86.7 KB Created: 2021-09-02 03:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: fc8854d00d9e636b67f3634f632778b8 SHA-1: 4e042a5970d8adbf31870f7a612cb141eaca64f6 SHA-256: 4e093c299830565e7eecae8b31e4b12d0ab7a31673434e8f4d002ad75ed3ecd3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The presence of external URIs and link farms suggests an attempt to distribute malware or conduct phishing attacks.

Machine Learning

Nyx PDF Classifier malicious score 0.9904

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://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861ad897f3e---17455196833.pdf In PDF document text
- https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105785c8d43d---retapewelizolegudoveku.pdfIn PDF document text
- https://madspot.dk/ckfinder/userfiles/files/tepejiwumoki.pdfIn PDF document text
- https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16100ca5d0c797---7816951331.pdfIn PDF document text
- https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e21cba5b71---8097943311.pdfIn PDF document text
- https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608405ebdf74b---fegerog.pdfIn PDF document text
- http://thuephotocopytaihanoi.com/upload/files/vademodisavonu.pdfIn PDF document text
- http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6987a3ccb7---99765155290.pdfIn PDF document text
- http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/38371920086.pdfIn PDF document text
- http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b659e429c85---vomovewapijezidutizen.pdfIn PDF document text
- http://ridendo.cz/files/file/tumetajefadigo.pdfIn PDF document text
- https://arerp.kr/data/file///41192766706.pdfIn PDF document text
- http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/o8ekro9c4j4mjsjtn5p5e1pldt/72628311408.pdfIn PDF document text
- https://careerroots.net/ckfinder/userfiles/files/ruziwivifurazixure.pdfIn PDF document text
- https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/b840ee5a84dee2302ba68a4b6fb65a31/katipojajorotibisa.pdfIn PDF document text
- http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b89ea9f26cf---sinanagiki.pdfIn PDF document text
- http://alphasigmaoverseas.com/userfiles/file/12117286177.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a952d05d043---53399677774.pdfIn PDF document text
- https://warsztatgdynia.pl/app/webroot/media/files/sopenegogatosawuzizi.pdfIn PDF document text
- http://sarljarry.fr/userfiles/file/bejisupoke.pdfIn PDF document text
- http://bandbaajabarat.com/ci/userfiles/files/79632417914.pdfIn PDF document text
- https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/ausd4ktd4fbpcqsll6t5g4v12v/47366230054.pdfIn PDF document text
- https://mitrasuksesku.com/userfiles/file/vukixezobojarajel.pdfIn PDF document text
- https://stl-log.com/htdocs/cljr/data/files/zijizimopemupipexegif.pdfIn PDF document text
- https://stiff.pl/ckfinder/userfiles/files/malaxufanipi.pdfIn PDF document text
- https://fullmagicweekend.com/ckfinder/userfiles/files/vobixogud.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=can+toads+eat+wormsPDF 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_off0000e95f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE95F	10388 bytes
SHA-256: `cb274d9ddb1ce158d3e22139784c6c5455eee9476e6df17d94fe0078536918b0`
`font_01_sfnt_off000100fd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100FD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001190f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1190F	19632 bytes
SHA-256: `79abe46f1b3c083267d9800aafccb0710a1530c746b08e6b02549cfb0cf39169`

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