PDF malware analysis — malicious · 31030c14e8b6051a

MALICIOUS

PDF

65.0 KB Created: 2020-11-23 16:38:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16

MD5: f4eb27c3220ef6d870e308c4c7461863 SHA-1: 9d2995747064d5a845f47392b5bf31cae39e2dab SHA-256: 31030c14e8b6051a5ee3c74deeb89ca45016393f130f3fbe1bc3ebe0d6cdaae8

244 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, with heuristics indicating a link farm designed to redirect users to potentially malicious sites. The presence of a known malicious redirector URL and the ML classifier's high confidence score suggest this document is part of a phishing or malware distribution campaign. No scripts were extracted, but the link farm itself is the primary attack vector.

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 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.
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.
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://ggtraff.ru/123?utm_term=2010+chrysler+town+and+country+owners+manual In PDF document text
- https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/b92a210c.pdfIn PDF document text
- https://pegejapadeju.weebly.com/uploads/1/3/4/3/134355249/jiziwevitexovamuba.pdfIn PDF document text
- https://febotagi.weebly.com/uploads/1/3/4/7/134728548/dewofofugudu_kebilu.pdfIn PDF document text
- https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/a2938ea02e9b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4468274/normal_5fa42045d1ce3.pdfIn PDF document text
- https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/lanotuzat.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
- https://s3.amazonaws.com/vawoginele/liniwoxuvuredesefinepu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f5970715-85d9-4a0c-a770-89380666d1bb/when_i_was_puerto_rican_movie.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8f767ffb-4ca0-4554-9dbd-322bf18089e3/zijasoxuvoku.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f830e93d-bc2c-4808-958e-91d725a9697d/somalu.pdfIn PDF document text
- https://s3.amazonaws.com/wizedumi/bilapekejodesiv.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cc5b2510-a116-4ede-8ba2-9eb148b99c8e/36609884997.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bfd7bd8e-c08a-442c-b67e-8ddf2bb3eec9/ledoxunimoluja.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/66365919-2555-43dd-b1e9-ea57582caa01/cha_du_ri_father.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/deea011f-c543-49b6-a4f3-58e73b3563cc/93339209490.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/27d83b29-d731-4c3f-8c87-496f2a8d0a5f/27185971991.pdfIn 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b513.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB513	5440 bytes
SHA-256: `1ec8a869421e7105aa86a36bb5041909db8756f51cf2473d6dc221646bb3f17c`
`font_01_sfnt_off0000c765.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC765	9660 bytes
SHA-256: `443aabfbc6f890bb8002229047baba1c070e0911297403a7bef89c86e0b60e8f`
`font_02_sfnt_off0000e87f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE87F	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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