PDF malware analysis — malicious · b92f9b744ac22262

MALICIOUS

PDF

85.0 KB Created: 2021-07-23 01:48:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 58e984ac41a75f570d795a6a4b1c7deb SHA-1: b96fa962da93d3591da6b5c9c06276ab8f92fa6c SHA-256: b92f9b744ac22262e4d079cb2769ee39798a435217de309cdea30baf52a8f4ea

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the nature of the links and the detection indicate a likely intent to redirect users to malicious sites for further exploitation.

Machine Learning

Nyx PDF Classifier malicious score 0.9860

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 http://www.annaleehuber.com/content_files/file/93063685659.pdf In PDF document text
- http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/qqpast45uucbmdnqs93msq7tb3/ketezuf.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/df2d2fb13c2132a3ca8e03d5abda8719/10655461993.pdfIn PDF document text
- http://reanda.com/jingkelun/userfiles/files/20210614200137.pdfIn PDF document text
- https://mobilieroccasion.fr/uploads/file/kodokisurasafibemovinuk.pdfIn PDF document text
- https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607527c618b0c---59071733764.pdfIn PDF document text
- http://hanhthien.net/uploads/file/lorukipunexokafunomurani.pdfIn PDF document text
- https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/7e278d30b12928ed782bee2cc7dd3de6/95054668526.pdfIn PDF document text
- https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16078880dcd373---30724627447.pdfIn PDF document text
- https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/33dihhj60ps2p8e0koq1i0j6mk/wagipuwejikunowepegijeb.pdfIn PDF document text
- https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/804752401d734bbac572a1ec0056ecfa/67046968176.pdfIn PDF document text
- http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160778afe2898d---tagokusebadilomerejajus.pdfIn PDF document text
- https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbf92c3800---13377244894.pdfIn PDF document text
- http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b94c9ef3897---zoxuv.pdfIn PDF document text
- http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a092510956b---bamepowuwojudebimojezavir.pdfIn PDF document text
- http://surausa.com/uploads/files/634219459.pdfIn PDF document text
- http://ypcalumni.com/clients/2/24/24042806289e0d450134266962f0a0d8/File/63619474676.pdfIn PDF document text
- http://lutechmed.com/Images_upload/files/10429228516.pdfIn PDF document text
- https://digireg.org/upload/pefemulorekadasa.pdfIn PDF document text
- https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/6beirqskielvcjmo6l6a0jq6a3/garibotuwipikisirajam.pdfIn PDF document text
- http://zrdb-drogbud.pl/Upload/file/lasafusebopi.pdfIn PDF document text
- https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f436621736c---81782916252.pdfIn PDF document text
- http://thetachikappasigmaalumni.org/clients/5/56/56ac51e2ee760b54d3ff8b7d53c877b7/File/58591115691.pdfIn PDF document text
- http://libron.pl/fckupload/assets/file/53973733868.pdfIn PDF document text
- https://kitapkapla.com/upload/ckfinder/files/tepofig.pdfIn PDF document text
- http://bukharageorgia.com/sites/default/files/file/vuloxili.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=hot+sauce+hiccupsPDF 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_off0000e9ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9AC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000101be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101BE	17652 bytes
SHA-256: `69f522b2ea111cdf87fc2ad30c1ba585e36183ab6d5babaf51b691a82022dd83`
`font_02_sfnt_off00012f4b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12F4B	10312 bytes
SHA-256: `32fca7e4e725c10c5a78c9f94a1d952547db25b12ef6e5d99db59bd20d0ef8f8`

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