PDF malware analysis — malicious · b87c9ed72b36c861

MALICIOUS

PDF

78.7 KB Created: 2021-04-05 16:17:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 03f7915c270496b57a409af4cd60e225 SHA-1: ed37c7dd8466dbcb1037db3c6fff20464ccecfc0 SHA-256: b87c9ed72b36c8613bd5ba7095b8a2b358cb2d9eeef61390047e977647d772fe

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a technique often used to redirect users to malicious websites for phishing or to download further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, suggesting a campaign to distribute content or lure traffic. The ClamAV detection and ML classifier also strongly indicate malicious intent, likely related to phishing or trojan distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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://gimoguvi.ru/strik?utm_term=hound+of+baskerville+movie+with+english+subtitles PDF link annotation
- https://cdn.sqhk.co/vimexuda/iihyhak/racing_in_car_games_download.pdfIn PDF document text
- http://about-central.com/75313527200lulb7.pdfIn PDF document text
- https://cdn.sqhk.co/doxowite/jYigihh/pay_express_toll_route_407.pdfIn PDF document text
- https://cdn.sqhk.co/fiwujumejuf/ljgjjhb/17390260318.pdfIn PDF document text
- http://gufutaca6.xyz/36235284159qw4iq.pdfIn PDF document text
- http://grizhoff.ru/object_oriented_programming_c_course_outcomesg97jh.pdfIn PDF document text
- http://bigwin-1xbet.fun/77970741033pqp20.pdfIn PDF document text
- https://cdn.sqhk.co/bafiweba/ddtMgfb/minecraft_clicker_mod.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://s3.amazonaws.com/xoguwavosuje/tojipezevepovavu.pdfIn PDF document text
- https://s3.amazonaws.com/bewibiwat/51442069825.pdfIn PDF document text
- https://s3.amazonaws.com/nowonovege/odisha_police_job_information.pdfIn PDF document text
- https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_46fe57f040a144b9be63622d7a783954.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/ronenitevodo/44065167431.pdfIn PDF document text
- https://s3.amazonaws.com/viromibukoleliw/journal_citation_reports_science_edition.pdfIn PDF document text
- https://d2faa26e-66ca-44cd-8f84-883624a71019.filesusr.com/ugd/dbbfd0_55e52edb24e04b6eb394dd362dc9ad52.pdf?index=trueIn PDF document text
- https://8a088b33-2c08-4a8c-8d17-3b052cb5145e.filesusr.com/ugd/94e5ef_0f6a7492fd97426f8340d834f1c87b02.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/gedexim/cheese_in_the_trap_movie.pdfIn PDF document text
- https://be8f41f0-9ddd-434d-ab6d-aa755a40b80d.filesusr.com/ugd/726d9c_414ca83b34644afdbd348a5494360b44.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/mejifavo/74685743952.pdfIn PDF document text
- https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_b8407d85cf3f48de8d31b515db6e703b.pdf?index=trueIn PDF document text
- https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_7f7969e9e4534c2881505c0b9e5cbe49.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/gonasidupij/goxupubilowitinifisox.pdfIn PDF document text
- https://s3.amazonaws.com/lebejos/ritoxipow.pdfIn PDF document text
- https://s3.amazonaws.com/padosumifubobo/53313031876.pdfIn PDF document text
- https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_11306f58eecb41359533b589b623e030.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_off0000e7e9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7E9	5520 bytes
SHA-256: `01153b0e620649d23206f578012514a1dd93853fa3df3c7429db9c13c41489a0`
`font_01_sfnt_off0000fa95.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA95	10432 bytes
SHA-256: `5730d0ff4802cee9a0e4a23ab92928c842c059db7153335d6eb5a2d249a7511d`
`font_02_sfnt_off00011e78.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E78	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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