PDF malware analysis — malicious · e400c222a8741088

MALICIOUS

PDF

171.2 KB Created: 2021-04-01 13:54:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 03cf7d8c8ad6b34b696d000ec57da6e5 SHA-1: 6f577f35e3453a480adca98f1411b9210f3dc979 SHA-256: e400c222a8741088f682cb01869b142d0d3b0b529c08ae2d1b3835a98cb895fe

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 'nipisod.ru', which is likely part of the phishing lure. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://nipisod.ru/wix?keyword=phd2+manual+espa%25C3%25B1ol
- https://cdn-cms.f-static.net/uploads/4381098/normal_6059b79d53409.pdf
- https://cdn-cms.f-static.net/uploads/4420430/normal_601ee310b2935.pdf
- http://changepass.online/mejakotelivabajigobowpqf5.pdf
- http://fewizoge.22web.org/importance_of_girl_education_essay_in_hindi.pdf
- http://atomyimperial.ru/defiant_in_wall_digital_timer_instructionsgiif1.pdf
- https://static.s123-cdn-static.com/uploads/4368746/normal_600119132c70d.pdf
- http://nosinoski.shop/sofewumezagadelipijugs08g.pdf
- https://static.s123-cdn-static.com/uploads/4422877/normal_5fe2ce541bf3d.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/panalipolifod/josafudo.pdf
- https://s3.amazonaws.com/gawabog/57494347191.pdf
- https://s3.amazonaws.com/gisujubolidine/musonofigamuwapejewewej.pdf
- https://s3.amazonaws.com/gavobawum/metallica_creeping_death_tab.pdf
- https://s3.amazonaws.com/xunilukegez/fake_decorative_books_for_sale.pdf
- https://s3.amazonaws.com/muvazi/vabit.pdf
- https://s3.amazonaws.com/kagedatabujo/fe_electrical_and_computer_practice_exam_online.pdf
- https://s3.amazonaws.com/wonumafubij/when_is_delta_hiring_flight_attendants_2020.pdf
- http://kavakino.epizy.com/gonovixoze.pdf
- https://s3.amazonaws.com/tapexiw/atlas_copco_compressors_palatine_il.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00026444.bin` `35552937a1b858bf7c6fd3027a2b278358fa0d021dac01c6e7c5c7c553fe89ed`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x26444	5448 bytes
`font_01_sfnt_off00027661.bin` `aa62763f98c06243a4c5161c4aad27cb1a8a6cdb516a7b1602cb7c477db0a0c5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x27661	12276 bytes

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