PDF malware analysis — malicious · b138422d030664e0

MALICIOUS

PDF

83.0 KB Created: 2021-08-09 09:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 6f12e8a5543add6c4c73b5096a906c81 SHA-1: f9943dbec741830beafbdbadaec3d5e0fe3e065b SHA-256: b138422d030664e0e8e9b730720bc8298c5994c529fe0ebfee9c5fd081b04e9b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1055.012 Process Injection

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the structure and URL patterns indicate a phishing or malware distribution attempt.

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://414movement.com/wp-content/plugins/super-forms/uploads/php/files/b9619edd5bfcc5fa150dea74162dce0f/wawetikakupuxim.pdf In PDF document text
- https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/c7e22bd293dcf5f7ba63581d08e25ccb/tofigopaxivajukut.pdfIn PDF document text
- http://bernardthevenet.fr/ckfinder/userfiles/files/54491687991.pdfIn PDF document text
- https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/5708c4e9337eb5d92443cf7e22fcd101/xezuv.pdfIn PDF document text
- https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/dcf58cd9c4ef08178c61aac889946f2c/zomusuwasuw.pdfIn PDF document text
- http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0749a169ac---mizix.pdfIn PDF document text
- http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608212283103c---zevokuwidazawakador.pdfIn PDF document text
- https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/5a9hgji18j1ldkp5269721264b/3462785544.pdfIn PDF document text
- https://big-affaires.com/img/pics/files/42044125564.pdfIn PDF document text
- http://riph.pl/userfiles/file/tafapepasiwolaw.pdfIn PDF document text
- http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4bced1da4---63906910253.pdfIn PDF document text
- http://smeeing.com/userfiles/files/detagipugosasi.pdfIn PDF document text
- http://orbitsecurity.qa/pro_mvp_tech/uploads/file/10565055238.pdfIn PDF document text
- http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/a212a1996e81bead4bf94b9d79c6fe05/46583660818.pdfIn PDF document text
- http://usagimatur.com/files/others/47444156397.pdfIn PDF document text
- http://okmarin.ru/userfiles/file/85964688559.pdfIn PDF document text
- https://butchercurnow.com/img/shop//contents/21378573985.pdfIn PDF document text
- http://wowbond.com/upload/Fckeditor/file/wokid.pdfIn PDF document text
- https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/c40f60204c20fc42dc8e97ca97c77343/romokefajedakesara.pdfIn PDF document text
- http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91fcbb0a5b---refevanimupaniz.pdfIn PDF document text
- https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/nagiu8kco7a6tp2c0mvuje6mr6/70814608735.pdfIn PDF document text
- https://readandenjoy.ae/userfiles/files/57476853182.pdfIn PDF document text
- http://autowassenindex.nl/images/uploads/dupirunenomarosi.pdfIn PDF document text
- https://accesoriosalmayor.com/images/userfiles/file/nemotosutoxikavovakuworob.pdfIn PDF document text
- http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/92044211276.pdfIn PDF document text
- http://anhuifan.com/upload_fck/file/2021-5-2/20210502035910959586.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=where+is+barrett+jackson+in+las+vegasPDF 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_off0000dd36.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD36	10928 bytes
SHA-256: `ff1ee56e32f0c9739f900bdad3acc0d90a1ba45d270f3eded39ca76c94a99f42`
`font_01_sfnt_off0000f688.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF688	17464 bytes
SHA-256: `3392321de6a9e281cdb4bc33c8aeaaef19fe73702cec776878ce2fc93dd5c91e`
`font_02_sfnt_off0001246b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1246B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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