PDF malware analysis — malicious · e98b0b6631091cd9

MALICIOUS

PDF

76.7 KB Created: 2021-05-21 03:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13

MD5: 34b9f7e4cfead2e2cb2af1bfe17e886a SHA-1: f68d5a7df7e951cb5c34ee75be3f999edf582524 SHA-256: e98b0b6631091cd9b384992048c843fc237cd17837702250909d668fbe5a1c40

156 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 are to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_URI' heuristics. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or to download further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

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.
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://zajinet.ru/strik?utm_term=2011+auditor+general+report+ontario PDF link annotation
- https://befadileniralan.weebly.com/uploads/1/3/6/0/136082268/xureliwapepirovebo.pdfIn PDF document text
- https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/fivukej-senomofunes.pdfIn PDF document text
- http://publications.gc.ca/pub?id=9.569395&sl=0PageIn PDF document text
- http://publications.gc.ca/pub?id=9.569395&sl=0PageIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/getizar/spri_resistance_band_exercise_guide.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e1bc205a-a3b4-4dad-bc0d-4bc203745667/28208797870.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2bab2fe2-a72f-496b-bf31-8ef99f47d298/rixajikusotibegosagipivon.pdfIn PDF document text
- https://s3.amazonaws.com/ladojenefe/61367360650.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/470ff5bc-2c16-4912-a818-8491acb74628/how_many_characters_are_in_the_first_harry_potter_book.pdfIn PDF document text
- https://s3.amazonaws.com/zafijukopa/rosumim.pdfIn PDF document text
- https://s3.amazonaws.com/nuvukivaxiren/17037890444.pdfIn PDF document text
- https://s3.amazonaws.com/suxugipipolazog/cien_aos_de_soledad_gabriel_garcia_marquez_resea.pdfIn PDF document text
- https://s3.amazonaws.com/goveruduzewoxu/vugofurabelafibitoxuneg.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f590dfe2-9f9c-4471-9060-f526807f5172/68297568461.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/efadbe13-9608-4d29-91b8-1d1f63561e32/family_feud_rules_board_game.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8c172857-f5cb-46a5-a85b-b13baae356e1/suvax.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/51329b69-3e43-463c-a5b1-e95e67b62149/17495465387.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/83e2e035-4d8f-49a9-84ae-849778bebd84/moto_360_2nd_gen_change_battery.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bd6983c3-86d4-4bb4-8cb7-c574fc1d3ed8/halliday_resnick_physics_book_download.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e337b55c-6d3f-4653-b53e-c42234cb5148/metforas_de_la_vida_ejemplos.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d9a4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD9A4	5180 bytes
SHA-256: `8ce1f68c7f23608cb74215b3c604ede24a19c1a13b1ca5c5d31b9d75f7c667a3`
`font_01_sfnt_off0000eb56.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB56	10956 bytes
SHA-256: `36f625e6f687024223931273749cbc3277e852d41b6fd681e8d1c39e8d8f1af0`
`font_02_sfnt_off00011027.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11027	16204 bytes
SHA-256: `c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449`

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