PDF malware analysis — malicious · b32080ed6d351667

MALICIOUS

PDF

76.6 KB Created: 2021-09-06 07:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: ddb4db38d506a0c5e77b864d2e1ff7b4 SHA-1: b2307b954f953e226778de74438f28aef0e5b838 SHA-256: b32080ed6d3516670b613a7de959cf4cde7f9feeb0d5afe637388fbe19e11377

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm used for phishing or malware distribution. The PDF's structure and embedded content indicate it's designed to redirect users to external, potentially malicious, URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/b4cc862325eb2c1c169c2240d210d348/nupoxuxonugujakomafizeb.pdf In PDF document text
- https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcaab15c65a---xofujopi.pdfIn PDF document text
- http://drzwiukryte.pl/userfiles/file/pujivavuzarevidujexi.pdfIn PDF document text
- https://jagamimpi.org/contents/files/lanejogesisunepetojulemag.pdfIn PDF document text
- http://granitemountainranch.net/userimages/45274946214.pdfIn PDF document text
- https://littlelightnepal.org/userfiles/file/tetifizemavifutakevo.pdfIn PDF document text
- https://aonetreks.com/uploads/file/6911398141.pdfIn PDF document text
- https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7daf2f1531---zezopanaro.pdfIn PDF document text
- https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/89409326115.pdfIn PDF document text
- http://ski-experience-japan.com/images/blog//file/tukafejabito.pdfIn PDF document text
- https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865868dbf2d---luvozokubivobexunevu.pdfIn PDF document text
- https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/9ndsgjfnqa3vncd8akqv6jv9mb/kilofobubodumonisowa.pdfIn PDF document text
- https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/e17a2d084d3abe25875654aedba50fa9/33173441088.pdfIn PDF document text
- https://jancsoalapitvany.hu/ckfinder/userfiles/files/59042509030.pdfIn PDF document text
- http://smartarts.bg/userfiles/file/xulakujuwamajotatadufewa.pdfIn PDF document text
- http://fotossc.pl/_files/file/kutuvodebofoninetej.pdfIn PDF document text
- https://rajatotogroup2.com/contents/files/50611103306.pdfIn PDF document text
- https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/e61cc1789457fc7c7b2c30bc0e17456c/lalitawitusip.pdfIn PDF document text
- https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081b30b24fd4---3790618670.pdfIn PDF document text
- https://noddy.nu/images/file/21276309576.pdfIn PDF document text
- https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609126652456b---zenukaxu.pdfIn PDF document text
- https://accuratesearch.com/userfiles/file/nasowakovokelebixof.pdfIn PDF document text
- https://ka-base.no/images_students/files/84374511004.pdfIn PDF document text
- http://mnogonomerov.ru/uploads/file/45339330778.pdfIn PDF document text
- https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945fea626e1---48427487050.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=diabetic+encephalopathy+pdfPDF 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_off0000c9d0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC9D0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e1e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE1E7	10704 bytes
SHA-256: `19a9a7211942ef1ee4f7c38e2bd25fa96491cf05bc087ea7ddc40463d8229217`
`font_02_sfnt_off0000fa2f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA2F	16416 bytes
SHA-256: `7d593820bb84ccb272b6230128dad95fdd5e245d1138660898c347186fe26dd0`

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