PDF malware analysis — malicious · a1b0de8d27f3935f

MALICIOUS

PDF

75.7 KB Created: 2021-07-09 01:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: f305a970249db3c9702185052ed7c7cd SHA-1: b7695856c6fc8a9e93f24fc4e795e8eeeb58879b SHA-256: a1b0de8d27f3935fb96fc7dca2bab43c41cb1985c0eafebc6021b6367a28a724

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, likely serving as a distribution point for further malicious content. While no scripts were directly extracted, the nature of the link farm suggests an attempt to lure users to malicious sites, aligning with phishing and potential malware delivery tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9919

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://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/da6e5b6d898959a7fa11eddddef11de5/wewiduw.pdf In PDF document text
- http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/7b38a522b806e7af345f86948e8f8884/kajexix.pdfIn PDF document text
- http://akinmedical.com/uploads/file/23525485936.pdfIn PDF document text
- http://nowyhotelik.pl/userfiles/file/52060519234.pdfIn PDF document text
- https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/62d35b085335a199fe61faf9be643d1b/29958306070.pdfIn PDF document text
- https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/ah3927u9o22t2qc31o96ekv0l0/39805578847.pdfIn PDF document text
- http://a-swiss.com/upload/userfiles/file/losaruzuzufom.pdfIn PDF document text
- http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e5533ce9c6---49323458973.pdfIn PDF document text
- http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9d9c81f02---kesupiponemavibat.pdfIn PDF document text
- https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9be15597a1---xofodo.pdfIn PDF document text
- https://htchninc.com/d/files/97640686021.pdfIn PDF document text
- http://arohitourandtravels.com/userfiles/file/65713138041.pdfIn PDF document text
- https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b293421f75e---texupaxe.pdfIn PDF document text
- http://superfishinglewood.com/uploads/files/vakenegepipigur.pdfIn PDF document text
- https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/6f08250ee31fad9195daf05705d9c6a7/zovukefevub.pdfIn PDF document text
- https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/r9andu27gk0htcmv676bc8dpcm/logepukidaper.pdfIn PDF document text
- http://aircond.md/upload_fck/file/tagaxegalimoluwifusodiv.pdfIn PDF document text
- https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/206it3f2v1qr73opok57cc7116/vakadota.pdfIn PDF document text
- http://vimar.ua/userfiles/files/7679313819.pdfIn PDF document text
- http://hodinovysoused.cz/upload/file/96695497326.pdfIn PDF document text
- https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/69f0809bbce65a13ac4f58381d7f1e9a/5537219189.pdfIn PDF document text
- http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748ff4a4dcb---nujuvanad.pdfIn PDF document text
- http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8f269f652---90877244274.pdfIn PDF document text
- https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/c849a8da1174baa20e3d5f6455a58673/18178850395.pdfIn PDF document text
- https://guclupin.com/calisma2/files/uploads/resiwupeposiviteta.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=meaning+of+ancePDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000bc5e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBC5E	1860 bytes
SHA-256: `562d39cc93351683f3420870a5578826c1285db13c691c08f99be18f4980e560`
`font_01_sfnt_off0000c514.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC514	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000dd2b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD2B	10092 bytes
SHA-256: `8c2145c4e4dcf6af6d11319fc59a673b01bb2b46714c50e27cbe59c1566ac243`
`font_03_sfnt_off0000f3c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3C2	17900 bytes
SHA-256: `9d52b0b3a71be7f2ece2770e070470e0c95ab3cee6367137728c9c496e7f8f43`

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