PDF malware analysis — malicious · 67e57cf956cde4aa

MALICIOUS

PDF

89.2 KB Created: 2021-09-02 01:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 75282b0aa1911ac073158591ba39abf5 SHA-1: d038764dc9664c8ba888343cd52a49a8b60a69d2 SHA-256: 67e57cf956cde4aa2583655dd9faea96a1b5e4fe7d8b0c31589b591959ff8b3a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of these links indicates a likely spearphishing attachment attack vector, aiming to exploit users by directing them to potentially harmful external resources.

Machine Learning

Nyx PDF Classifier malicious score 0.9905

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://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/7956592507d292a316e8c4e39cece9d2/18045304325.pdf In PDF document text
- https://faktxeber.com/resimler/files/26691537803.pdfIn PDF document text
- https://effetre.biz/file/fajosagikagi.pdfIn PDF document text
- http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc96dca47e---tifakonu.pdfIn PDF document text
- https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/eod31dcrurjq9kmjhuqik1job4/87472760432.pdfIn PDF document text
- http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ebc20cd8e---48882950048.pdfIn PDF document text
- http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160753ab288474---21012496543.pdfIn PDF document text
- http://lovesenergy.com/file/54321101463.pdfIn PDF document text
- https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/a3a7c7386bc7720255ba5aabdf3948a9/ledafimoditoma.pdfIn PDF document text
- https://ketdoanbus.com/webroot/img/files/jotovemawemagenomijiboved.pdfIn PDF document text
- https://ludifrance.fr/userfiles/file/limowuxakefosa.pdfIn PDF document text
- http://flashdisplay.net/UploadFiles/FCKeditor/20210829095214.pdfIn PDF document text
- https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d89dd3c7de---vajaz.pdfIn PDF document text
- http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/mijamo.pdfIn PDF document text
- https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/eb772e62644bf25767e4c582e100258c/50231454877.pdfIn PDF document text
- http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bd4144280---nesesofikewopifalezibonez.pdfIn PDF document text
- http://thallo-food.hu/uploads/ckfinder/userfiles/files/18022480373.pdfIn PDF document text
- http://steffis-strassladen.de/userfiles/file/rovaxidodusotekibilobiki.pdfIn PDF document text
- http://atenngo.com/admin/sites/site/documents/dedamilemodufavofusu.pdfIn PDF document text
- http://christmaslandint.com/userfiles/sutifanejezokijugugofo.pdfIn PDF document text
- http://abimobiliare.pl/pliki/File/nunakisujajujotufojezixuz.pdfIn PDF document text
- http://baruraprotidin.com/assets/ckfinder/core/connector/php/uploads/files/wenabitinotodasopokul.pdfIn PDF document text
- http://fabtur.ru/upload/files/86226185194.pdfIn PDF document text
- http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/fi5vvukes05liieh5b38m9ega3/nizuj.pdfIn PDF document text
- https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/2311749a441da06c01378a83a923b21d/kenijap.pdfIn PDF document text
- https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/1c285162d3054022cc599578c80866dd/84943042757.pdfIn PDF document text
- https://mobilieroccasion.fr/uploads/file/lixejano.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=how+do+you+miscarriagePDF 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_off0000f69a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF69A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010eac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10EAC	18032 bytes
SHA-256: `fb89c6760fe42fc295a4b6e4a3fd56054afdc0d982e5755ede412bb3ed966608`
`font_02_sfnt_off00013d90.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13D90	10756 bytes
SHA-256: `0cfda6b0ced2f96be94f0953a9d27483d0f51346ce31e1c7f23e4d2fadb47c93`

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