PDF malware analysis — malicious · 0039f4e1daf7e834

MALICIOUS

PDF

75.9 KB Created: 2021-06-19 19:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 79da1e250364ac57ea1d4104800a893d SHA-1: 2d900a239c80fe5fc0805fe31d59454302706e88 SHA-256: 0039f4e1daf7e834ac452d835b3fe57c1d2bcec7ff947f5cb4522fe6551e230d

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the phishing lure attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 7

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://atamergranit.com/userfiles/file/dawuwipemevuvulakinuralo.pdf In PDF document text
- http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16091efc16805f---rujetojikaxigusinujaxub.pdfIn PDF document text
- https://alternativecarrepair.com/userfiles/file/35095695158.pdfIn PDF document text
- http://granite1962.com/clients/869125/File/74498857891.pdfIn PDF document text
- http://saokienviet.com/uploads/image/files/lomexalaferovedemaf.pdfIn PDF document text
- http://bycongroup.com/UserFiles/file/3110119215.pdfIn PDF document text
- http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607868308e0b1---19316219644.pdfIn PDF document text
- https://aashianarealty.com/file/14086549145.pdfIn PDF document text
- http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a38e888ddf8---zunaf.pdfIn PDF document text
- http://akkoryazilim.com/userfiles/file/zapapumujusewunaxibam.pdfIn PDF document text
- https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/8a8a71215a327fc3c60b2a19af3a772e/fijazopibezowulovaravu.pdfIn PDF document text
- https://atphp.ch/userfiles/file/92036454132.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://fedorahosted.org/lohitIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=mahadev+images+hd+downloadPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cc6a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCC6A	5008 bytes
SHA-256: `c24adf02b9d73c13e9691a1c06799e61afe420bcdace5e4161f165a530b5bb48`
`font_01_sfnt_off0000dd61.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD61	12928 bytes
SHA-256: `568f6d98b124fd4f051d27bdcff0848f2653ed351f70a9c98acde4042128afc6`
`font_02_sfnt_off00010710.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10710	4324 bytes
SHA-256: `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`
`font_03_sfnt_off00011510.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11510	3492 bytes
SHA-256: `5523b081bcb6d3fb153639327d8330fc558b23d5175d71f7baa4cd941f422372`

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