PDF malware analysis — malicious · e697c4479779b628

MALICIOUS

PDF

71.7 KB Created: 2021-06-06 22:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29

MD5: d291096e96958619fb9f0b8929250eb1 SHA-1: e8610b8f06bf4f76f8741d0f461681704c0a76e6 SHA-256: e697c4479779b628f866a3e0016efc96b6008a33789b44d10e22a1961634ebb3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to song lyrics, directing users to external URLs. These URLs are hosted on compromised WordPress sites and disposable domains, suggesting a link farm or phishing campaign designed to distribute further payloads or collect user information.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://chcial.ru/uplcv?utm_term=lirik+lagu+lady+gaga+ft+bradley+cooper+shallow PDF link annotation
- https://rivaflo-south.in/userfiles/files/kiledenasuwujumoxul.pdfIn PDF document text
- http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5d622db31---3859866224.pdfIn PDF document text
- https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/6ns41ic8oa0v7dcgnvoihd6si3/18464732102.pdfIn PDF document text
- http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa866aaeeb2---lagaxi.pdfIn PDF document text
- http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5514583dd---xunogusubi.pdfIn PDF document text
- https://sahyadrisevasanstha.in/userfiles/file/20354844990.pdfIn PDF document text
- https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/ff34f98d5981fc9259902650ff4857f1/43430885344.pdfIn PDF document text
- http://brandnewgoods.net/userfiles/file/25116600704.pdfIn PDF document text
- http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/18577820bdd6ab1186fcb3b5ed048bd8/73414549673.pdfIn PDF document text
- https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/q6l12a4dcbmi6te0207nv73771/29708954154.pdfIn PDF document text
- http://clinicaveterinariabilancino.it/userfiles/files/kujomakilumodikab.pdfIn PDF document text
- http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb4a2d9222---repodajogodatonekesami.pdfIn PDF document text
- http://zpb-maciejewski.pl/upload/fck/file/14671971115.pdfIn PDF document text
- http://analogsys.com/uploaded/file/188051923260897c4e02736.pdfIn PDF document text
- https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/k2iq2hoe61frel9eq9bflj051l/latiwowe.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d7ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD7AC	5756 bytes
SHA-256: `ee14a826761beafb1abbbbc104d1ca167e1065a43f7dfa510db1f0b123d473f2`
`font_01_sfnt_off0000eb5a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB5A	10604 bytes
SHA-256: `1c83c1d3bba0e4304054238b42d62cee0285cef090ca06bd48e443d68654d7e2`

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