PDF malware analysis — malicious · d3bed5e661d96403

MALICIOUS

PDF

72.1 KB Created: 2020-11-13 05:06:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 10a6ebc4882704058ee204b8becd068a SHA-1: 1f599fbcf25c0eafa926b142cabb6eda71813365 SHA-256: d3bed5e661d9640385e3592dae5656e852b31ab7f0de1fd6baa5a59761ae75ac

214 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple critical heuristics as malicious, including a link to known malicious redirector infrastructure and a PDF link farm. The embedded content, though heavily obfuscated, suggests an attempt to masquerade as a search result for a book, likely to trick users into visiting the malicious URL. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://gettraff.ru/123?utm_term=a+people%2527s+history+of+the+united+states+by+howard+zinn+pdf
- https://penulikadima.weebly.com/uploads/1/3/1/4/131482887/4497185.pdf
- https://rifodomofakape.weebly.com/uploads/1/3/4/6/134627700/26ae21941.pdf
- https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/jogabox_xabifexafove.pdf
- https://gowutejuvotebap.weebly.com/uploads/1/3/4/3/134372770/janofozokukozinozofo.pdf
- https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/dulofawufem.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://uploads.strikinglycdn.com/files/ac358525-dcea-49ca-872c-eb7e6495782c/12658308628.pdf
- https://uploads.strikinglycdn.com/files/cbbac980-7243-49d0-b107-1b884ad727d4/63841506875.pdf
- https://uploads.strikinglycdn.com/files/14f5e0b4-5381-4a00-a935-bbbd0baecc0f/rulopuxoson.pdf
- https://uploads.strikinglycdn.com/files/aee71955-f9d3-4482-9a55-1fbc55075cf0/97395135881.pdf
- https://s3.amazonaws.com/remeranexe/capas_que_componen_la_atmosfera.pdf
- https://s3.amazonaws.com/fumiposamisur/el_camino_college_library_staff.pdf
- https://uploads.strikinglycdn.com/files/946c0eba-c391-410e-ae75-9b348e8fc207/88119627379.pdf
- https://s3.amazonaws.com/zategafozasiru/nogavabudevukanutuxa.pdf
- https://uploads.strikinglycdn.com/files/aa7748f8-b251-405f-8ef0-022b60c06af6/49100144841.pdf
- https://s3.amazonaws.com/towakog/all_characters_in_count_of_monte_cristo.pdf
- https://uploads.strikinglycdn.com/files/a572f06a-d3dc-4d2f-a269-2743e78db7a6/chris_brown_ft_tyga_better_mp3_download.pdf
- https://uploads.strikinglycdn.com/files/7473acf8-184e-4547-ba7d-933f87d26640/38969689129.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ce9c.bin` `f0dcf09a6cafd1c66a9a780aebf1dbe78e689bb6e9a597c798312ae0816b05a0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE9C	5420 bytes
`font_01_sfnt_off0000e11b.bin` `39d831a384d53029c2b8f31f496692acf2326b050e9df33137730dca8955e238`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE11B	10480 bytes
`font_02_sfnt_off00010475.bin` `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10475	4324 bytes

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