PDF malware analysis — malicious · 78b1f6fb60f36c7f

MALICIOUS

PDF

67.2 KB Created: 2020-12-01 23:46:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02

MD5: 0d0295109f91f333cba83ab0a11958c7 SHA-1: 7bd0f61bef2becf3ee463c249701e61f03e95de3 SHA-256: 78b1f6fb60f36c7f5a5c20ea3481ad41c8b9aee39540a5f5c7e7870a47da9b00

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains heuristics indicating an embedded external URI, and the ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text that appears to be a lure for a "Nest thermostat guide pdf". The primary IOC is the external URL found within the document.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://traffnew.ru/aws?utm_term=nest+thermostat+guide+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4413462/normal_5f93d342f1cea.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4461219/normal_5fc36928a0426.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/jubiferekaka/10485290962.pdfIn PDF document text
- https://s3.amazonaws.com/fonibinaraj/37110792050.pdfIn PDF document text
- https://s3.amazonaws.com/muvojugejoxip/78417614398.pdfIn PDF document text
- https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe3f01e6d49a06bb5d191e/1606303491710/80047185440.pdfIn PDF document text
- https://s3.amazonaws.com/pizivurapab/change_over_time_crossword_puzzle_answer_key.pdfIn PDF document text
- https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1b31b24ece27e9146c9b/1606228785821/38732524246.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b744b57b-9e53-4b44-bd61-32382f2f27d8/kefedanidugagirud.pdfIn PDF document text
- https://static1.squarespace.com/static/5fc389629955c744b54c2322/t/5fc3ee4508845d092402caef/1606676038317/todomovus.pdfIn PDF document text
- https://s3.amazonaws.com/tonemakopinibem/zirodamirukuvu.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cb01.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB01	5392 bytes
SHA-256: `bd69256dca4674cabfedaaa6efa60904e58e0add35853a8274a1fa220f5ba7c8`
`font_01_sfnt_off0000dd2f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD2F	10360 bytes
SHA-256: `82a630bd0574b78bfb4184e9ca5bf48861f2068a6eeda6c80193babe45799f51`

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