PDF malware analysis — malicious · 6bb8f18f8533970c

MALICIOUS

PDF

66.5 KB Created: 2021-06-25 15:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: b73113848da00407eea455ec25915d0d SHA-1: 596b99e126b9e751049dd61229d63ef149df9f8b SHA-256: 6bb8f18f8533970c6cd3019600bdfa6963525d2df53ddcd013bb8d657f432b9a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The PDF's structure and embedded links align with techniques used to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

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://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/dc584f8fbebfa7481761a81033c772a4/75805158672.pdf In PDF document text
- http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8a4872729---livugoxupe.pdfIn PDF document text
- http://digifast.cz/userfiles/xegarabomorumepotusofepul.pdfIn PDF document text
- https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/11b5ffcc813e20a3cb9ac06451a98e01/ririgidukadaguludulobeji.pdfIn PDF document text
- https://arerp.kr/data/file///67780090795.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6642d6b71---wunupiwiwumeseb.pdfIn PDF document text
- http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160cc26f8a46cd---mejotusoro.pdfIn PDF document text
- http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/aildqg4reevodib6c0hm6cpjc3/76153094473.pdfIn PDF document text
- http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d19952324f7---vamonitoxunodubajepijo.pdfIn PDF document text
- http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16072a51c557a6---rosoribonof.pdfIn PDF document text
- http://www.cavice.fi/tiedostot/files/58998857474.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864d4452f0d---vidid.pdfIn PDF document text
- http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16070aec9475c6---jaxofiwol.pdfIn PDF document text
- https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/95e20fbcde28c2efe10c958be0ecd86d/77651917650.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=print+array+in+cppPDF 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_off0000a980.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA980	10016 bytes
SHA-256: `27a3d2be6844dc96e2ecac9ffac251c203bf261ece8990396244ad93af2a20e2`
`font_01_sfnt_off0000bfdc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBFDC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000d7ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD7EE	15012 bytes
SHA-256: `98338866951a8e9cf10361fe2e43ab28363ceb0536e48ab4f9be7afcbe553561`

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