PDF malware analysis — malicious · 7f888f963a98570f

MALICIOUS

PDF

88.2 KB Created: 2021-06-28 02:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: a4f318c1c097b1aea7cbb5646ab698c0 SHA-1: 4f0d305a71a399591e69f2ef56cabc441a37ccde SHA-256: 7f888f963a98570f003bd11dbbeab0a0272686fbfe6064faa6ef1c2354646570

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting it functions as a link farm designed to redirect users to malicious or phishing content. While no scripts were extracted, the presence of these compromised links and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://philabc.ru/uplcv?utm_term=pranks+over+text PDF link annotation
- https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160ae610af109c---73265199175.pdfIn PDF document text
- https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a081192a90a---dafaw.pdfIn PDF document text
- https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16089e29bb7823---40004746137.pdfIn PDF document text
- https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/26eb107d4baf6687a33888084cfc30d9/59297613437.pdfIn PDF document text
- https://cape-electronics.com/media/file/zirul.pdfIn PDF document text
- https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/gj08qui7iv30tnlnmuijrcfq3q/wigudap.pdfIn PDF document text
- http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/1615195343dfec5652ccf777f65ed15e/penusad.pdfIn PDF document text
- http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7b7d1635f---95942278461.pdfIn PDF document text
- http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/53420123233.pdfIn PDF document text
- https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/ass7r9g0pslia0hmd1orlbla4k/vibuwomasinumenudubitoza.pdfIn PDF document text
- https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b7e11c7da---pegajixez.pdfIn PDF document text
- http://goref.ru/files/file/lejigitubisefikosipawil.pdfIn PDF document text
- http://artgraf24.pl/userfiles/file/51395800356.pdfIn PDF document text
- https://actorconseil.com/files/file/febaxujixonutal.pdfIn PDF document text
- http://emirates-offshore.com/uploads/image/file/58037833455.pdfIn PDF document text
- https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/f05f91f064b1efe4177b3d2c6e793f0b/dezoxivajujuvemun.pdfIn PDF document text
- http://curry-box-deluxe.de/userfiles/file/famazapadidirobu.pdfIn PDF document text
- http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f75786039d---32945145549.pdfIn PDF document text
- https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/ab147407180eaa63762c9f5b060ece8a/20246949008.pdfIn PDF document text
- https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2f47af76d---rexaj.pdfIn PDF document text
- https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096d83a5bf88---semenuvomatubokejo.pdfIn PDF document text
- https://everestart.com/images/stories/file/38437355452.pdfIn PDF document text
- https://encoregallery.us/wp-content/plugins/super-forms/uploads/php/files/0fa184b533d8c78a5b35b30d86c4db5a/pubinalorav.pdfIn PDF document text
- https://accesoriosalmayor.com/images/userfiles/file/23294654373.pdfIn PDF document text
- 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_off0000f897.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF897	10224 bytes
SHA-256: `b68ff125cf901d75ee79a709936633e17a0ec53d720bd71472ae05957e8a7dd5`
`font_01_sfnt_off00010fc0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FC0	17084 bytes
SHA-256: `27f12e75f6a176f5f24c7740ed0990db6fa599523236d7fc1a6c214de56554c5`
`font_02_sfnt_off00013bf4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13BF4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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