PDF malware analysis — malicious · 65d49165285f3e6a

MALICIOUS

PDF

84.1 KB Created: 2021-06-26 02:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: de5f161157e1afe66da89355cf180f52 SHA-1: bb64246967220b0363a984edee4301d9047e0565 SHA-256: 65d49165285f3e6a58e3710de844b76579cdfff8b91678e4b157e9ded5eb6a91

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely intended to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest a coordinated effort to distribute malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/009a3e99be22b42ea914696da4184d40/wufitewirawobudug.pdf In PDF document text
- http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160ac02f0d9379---ponidejojakixiboxajetov.pdfIn PDF document text
- http://africareview.in/userfiles/file/lujebimegisujasije.pdfIn PDF document text
- https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/711274a991ee4eb09eac8018c2adb54b/90375501067.pdfIn PDF document text
- http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a84a1b0be64---71052965817.pdfIn PDF document text
- http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d4170512d26---zufejodex.pdfIn PDF document text
- http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a91b6f16221---lovasonimametipifipivifov.pdfIn PDF document text
- http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/niv38ejtem90vuc6biel7o2vr3/82436500954.pdfIn PDF document text
- https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/173185e52cc8b95e85e6a3a4d23a8819/93636520601.pdfIn PDF document text
- http://100gastro.cz/soubory/files/71593866863.pdfIn PDF document text
- http://kulturazebrak.cz/userfiles/76389210240.pdfIn PDF document text
- http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf40805ab4---9641948172.pdfIn PDF document text
- http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/1beugnkcjfcj1thl65gc8g9u74/ritopinaj.pdfIn PDF document text
- http://jagodkaprzedszkole.pl/userfiles/file/vusapabelitejaku.pdfIn PDF document text
- http://nuestratierrapremios.com/campannas/file/magir.pdfIn PDF document text
- http://winecellarkeeper.com/ckfinder/userfiles/files/tarufakefilisuzakozonodaz.pdfIn PDF document text
- https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/mlnhv5to0ia9e4sfrmdq8i5fg2/68670993009.pdfIn PDF document text
- https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/bhp3pbk7s7meav8t93fti3l1ie/wuwogu.pdfIn PDF document text
- http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/23229c70b086da7f2352fb514d2da87c/52703315713.pdfIn PDF document text
- http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa60c8b87cc---92107256312.pdfIn PDF document text
- http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/ft547t7faipdfdrvsciaa3bl97/vipen.pdfIn PDF document text
- http://zrdb-drogbud.pl/Upload/file/jijavojesikatuvuxiwogud.pdfIn PDF document text
- http://biaikatolikus.hu/files/file/14060964358.pdfIn PDF document text
- http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf4871f602---9438627594.pdfIn PDF document text
- https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906eeab86e0---zaxud.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=get+the+picture+tom+and+jerryPDF 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_off0000e2b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2B9	18020 bytes
SHA-256: `bba98a6dd466e0922110e0fa8d27dd1efcc051aa3c1d4e3093343092f0de4e9e`
`font_01_sfnt_off00011192.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11192	10948 bytes
SHA-256: `f3334fb4a64f2fed5b5567d28ce65506fec19d646f38c2f77179b44aba2e12cd`
`font_02_sfnt_off00012ac8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12AC8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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