PDF malware analysis — malicious · 474abf9c6b3f5cda

MALICIOUS

PDF

80.0 KB Created: 2021-09-04 10:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22

MD5: 9a4c6f2cf2c159d116063c7ab74364cc SHA-1: 0c7e1577e35254c4d491b07af4d3475e13a14f42 SHA-256: 474abf9c6b3f5cdab39808d54cfd9d3141c789ef9b26c3672f7bd0fb0175adb6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to facilitate phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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://lacecinella.com/writable/public/userfiles/file/nogafejafugedubozol.pdf In PDF document text
- https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/1e05cbfaa8cb1b3210510d409e37ab87/wururizaxu.pdfIn PDF document text
- http://bonfiremadigan.com/uploads/fckeditor/file/suweliboziduwedu.pdfIn PDF document text
- https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080388f69a5a---95704300547.pdfIn PDF document text
- https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf93884d7c7---wowasewovidumudosufe.pdfIn PDF document text
- http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nozizidupukodediv.pdfIn PDF document text
- https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087e0abe93a7---60779949779.pdfIn PDF document text
- https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609456355e347---16396519186.pdfIn PDF document text
- http://xn--djr00fsyfv0o5qgy9u.net/filespath/files/20210818061314.pdfIn PDF document text
- https://rkdestate.com/userfiles/file/30847549236.pdfIn PDF document text
- https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/1ej5vj40i97151vle224bnnaj4/75093060010.pdfIn PDF document text
- http://plncse.hu/php_data/file/39305999328.pdfIn PDF document text
- http://szentimresiklos.hu/upload/file/70636861795.pdfIn PDF document text
- https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/45677baa6f1dba9348ee35369a6701e1/35016328152.pdfIn PDF document text
- https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/837ac7a356d58b64faadc5bd9e203553/32501257307.pdfIn PDF document text
- http://beijinghuojia.cn/userfiles/file/78601046119.pdfIn PDF document text
- http://studiofelician.com/userfiles/files/vuxojofowa.pdfIn PDF document text
- https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/ac7f0ff6c01179dcf21a2e65bde98207/kifefurulobevosu.pdfIn PDF document text
- https://ntct-dz.com/ckfinder/userfiles/files/30264616255.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a986e661fe---ladalab.pdfIn PDF document text
- http://gotoippc.com/ckfinder/userfiles/files/pamemov.pdfIn PDF document text
- http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/fc3e8a2199765203a752a4ad4fff9dfa/genuforuxoboga.pdfIn PDF document text
- http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089838e0088c---65734198053.pdfIn PDF document text
- http://alnadaoil.com/userfiles/file/wulakutarunuvarozerokonab.pdfIn PDF document text
- https://quatcongnghieput.com/uploads/files/80804019029.pdfIn PDF document text
- http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612a256ea860a---64651451312.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=reduce+pdf+size+manuallyPDF 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_off0000d63d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD63D	16880 bytes
SHA-256: `2ab5385e52b4a1f61f292d842ec81f0a1be702372673239953416eaf6a019a50`
`font_01_sfnt_off00010178.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10178	10780 bytes
SHA-256: `0b9a5ca3c5a904ff51171568e76fe5c359674e55df2be21d4eeff7ca28d45641`
`font_02_sfnt_off00011a50.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A50	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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