PDF malware analysis — malicious · b9f4656317e2e506

MALICIOUS

PDF

72.6 KB Created: 2021-02-25 05:20:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 783524e61b7d258ec413bacd5efc6864 SHA-1: 4ba7a3b6e96311f4d6cf1ad551c29d0730a02d18 SHA-256: b9f4656317e2e50695e68751fc990bbded7763ccc8b72a6e48239040c721e7b5

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://seumenha.ru/award?keyword=que+es+un+taller+mecanico', suggesting a phishing lure related to mechanical workshops. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection indicate a likely attempt to redirect the user to a malicious site for credential harvesting or further exploitation.

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://seumenha.ru/award?keyword=que+es+un+taller+mecanico PDF link annotation
- http://dezlice.ru/dogmatismo_vs_escepticismocfhgy.pdfIn PDF document text
- http://jorowijedo.mywebcommunity.org/1217151907.pdfIn PDF document text
- http://wijetaz.mypressonline.com/32332381345.pdfIn PDF document text
- https://cdn.sqhk.co/lekusovu/hbjjNhd/mumoguxibuluxisusun.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/jivagajamav/gawanaxuli.pdfIn PDF document text
- https://s3.amazonaws.com/ratixifo/suxerexedida.pdfIn PDF document text
- https://s3.amazonaws.com/dudujopixejikug/the_embodiment_of_scarlet_devil_free.pdfIn PDF document text
- https://s3.amazonaws.com/lovetijif/dizetodir.pdfIn PDF document text
- https://s3.amazonaws.com/wopari/11053992508.pdfIn PDF document text
- https://s3.amazonaws.com/fomudebipefasu/why_does_my_refrigerator_leak_from_the_bottom.pdfIn PDF document text
- http://pulutugorivexek.atwebpages.com/how_many_carbs_are_in_a_blueberry_donut.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_off0000dfc8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDFC8	5008 bytes
SHA-256: `7d957eb6543965e8e99a01e4e1bc25d713818aea7d7d0f8d02bc24227619d5b9`
`font_01_sfnt_off0000f0b6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0B6	11596 bytes
SHA-256: `4740b0184be69c5b5019054630ab4dbddd2e1ab657fb042e66899e8cc68fce1d`

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