PDF malware analysis — malicious · 084fa28ca2f98a09

MALICIOUS

PDF

82.0 KB Created: 2021-03-24 20:51:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10

MD5: 5e28cfaca1bc37d1bb99fbe01d64a166 SHA-1: 5d65dd82a743b2e0b943745d97102b81a9c57312 SHA-256: 084fa28ca2f98a09288b30fb28e5044a14d22c7f80094724fdc325e1eb8c062c

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to disposable hosting or domains with unknown reputations, indicating a link farm designed to distribute malicious content. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest this document's purpose is to lure users to potentially harmful sites.

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
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.
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://resalured.ru/award?keyword=business+model+canvas+pdf+gtu PDF link annotation
- http://kimugifogetami.medianewsonline.com/tatkal_booking_form.pdfIn PDF document text
- https://wapaberupuz.weebly.com/uploads/1/3/5/3/135397773/a0b5a.pdfIn PDF document text
- https://limavewudadeku.weebly.com/uploads/1/3/5/3/135323498/nisunifib.pdfIn PDF document text
- http://zelumefepa.sportsontheweb.net/jefaxikuwimor.pdfIn PDF document text
- https://femesavez.weebly.com/uploads/1/3/1/3/131383434/6172872.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://5610d23c-e099-485d-ada5-1c5fec8f01b3.filesusr.com/ugd/97e063_8b25c82c89d64fdd933ce720d23f577b.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/temujonuwu/how_to_run_python_in_visual_studio_code_2020.pdfIn PDF document text
- https://s3.amazonaws.com/rimepusox/nifijuduxaguvuliwu.pdfIn PDF document text
- https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_6fed5d09fa36401a8905ae9736bbbbff.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/dowesitobuga/93583126035.pdfIn PDF document text
- https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_5cf203819f094d5cbb409a548e2e4f26.pdf?index=trueIn PDF document text
- https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_3fa0f8970b1f499183d75fe8706d9e0e.pdf?index=trueIn PDF document text
- https://e24ff460-1725-4b9d-a7de-f8438c38fea0.filesusr.com/ugd/366850_5f9184a1902341c29cdd0359c8f0dc6f.pdf?index=trueIn PDF document text
- https://cf268418-7549-4780-9cff-e39e61b5276c.filesusr.com/ugd/0b1cf2_48f1674df2c04cbc87483ba5b5bc2222.pdf?index=trueIn PDF document text
- https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_179bbaca11364348bcddf5134199ebb0.pdf?index=trueIn PDF document text
- https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_526d4fea56eb43409b823c65ccda95c4.pdf?index=trueIn 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_off0000f47f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF47F	5368 bytes
SHA-256: `dfcd003dcf18c97a66cd0ccd2198e7e56cd07355e45da7eae60639a11512380f`
`font_01_sfnt_off000106b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106B9	11532 bytes
SHA-256: `aea461692caf411f050775d943f183742dbf803becdd3fdc3ccc75428a9da514`
`font_02_sfnt_off00012d2b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D2B	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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