PDF malware analysis — malicious · 4f3fb97675c20bc9

MALICIOUS

PDF

86.1 KB Created: 2021-07-21 00:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 7d706fe5943c2b18673eb793666f36ed SHA-1: 3639ee2c1e7be3959144a7be9cfc7aa0c1a0136e SHA-256: 4f3fb97675c20bc98401c620ab61a73ea371ea6538f106c15b3174a60b57b3ae

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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 http://travelshops.pl/userfiles/file/28571435623.pdf In PDF document text
- https://adepotcustom.com/UploadFiles/file/20210507165202134.pdfIn PDF document text
- https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/13a6f0c72232be5051db98258ea9749c/54391336013.pdfIn PDF document text
- http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1609be69251bc3---1677865296.pdfIn PDF document text
- https://magiccat.pro/ckfinder/userfiles/files/78456159350.pdfIn PDF document text
- http://ldbell1965.net/clients/85689/File/46937171772.pdfIn PDF document text
- https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16076555661256---44749824145.pdfIn PDF document text
- http://delannahotel.com/user_img/file/winaxavogojubul.pdfIn PDF document text
- http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5673d7dca---nosexijavelonegalesom.pdfIn PDF document text
- https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16084b493e2361---65489749756.pdfIn PDF document text
- https://nisahanpin.com/calisma2/files/uploads/81475803181.pdfIn PDF document text
- http://bestpokeya.com/uploads/files/fedulokimu.pdfIn PDF document text
- https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/j11rq2432b4pgtti16iuv4k9j8/48823345495.pdfIn PDF document text
- https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/0ca8f4dfb24a9f8c712e4ce26fdab256/kepotedixojilemezujipej.pdfIn PDF document text
- http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160897534961d5---22787011659.pdfIn PDF document text
- http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11d65a03cc---89570202758.pdfIn PDF document text
- https://ms01bet.com/contents//files/99897266829.pdfIn PDF document text
- https://elearning-chemistry.ro/userfiles/file/52159557253.pdfIn PDF document text
- https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/np7t5aj7mbolf6rmssabfhbk5h/veguzosixegosovem.pdfIn PDF document text
- http://offerseir.com/basefile/offerseircom/files/89776395293.pdfIn PDF document text
- http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/68af5e0024f55155ce3ffe4fc3f1e095/89034795693.pdfIn PDF document text
- https://eyetracking.pl/userfiles/file/7659053463.pdfIn PDF document text
- https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/f5993ab93dc4892c1103b60ede24d741/zupoworigitigepa.pdfIn PDF document text
- https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160acd17eddff6---kowuxobo.pdfIn PDF document text
- https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e81b6562a3d---soxipefikadodiwox.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=red+dead+2+perfect+beaver+peltPDF 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_off0000ee37.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE37	10500 bytes
SHA-256: `f5dc0b92c50881c0e8f85543f411fba4b442f8df0255ca2a8899504636a51b19`
`font_01_sfnt_off00010616.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10616	17228 bytes
SHA-256: `8171c11d27d65ba4e10796974f9bea2e00b9885bdc09b578eeac739cb65c9378`
`font_02_sfnt_off00013327.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13327	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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