PDF malware analysis — malicious · ae8ce6483f5d5108

MALICIOUS

PDF

89.8 KB Created: 2021-03-17 10:14:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 7efa3a0b4434bacb3b270898f9bfc2c1 SHA-1: 24c81bfc53540e6bb9162554964a693b92747436 SHA-256: ae8ce6483f5d5108b1bff578fbca32edac418065f000dd0c00cff7629c994ee5

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 pointing to other PDFs, suggesting a link farm or SEO manipulation tactic. The primary external URL, https://baarspo.ru/award?keyword=descripcion+de+la+familia+asteraceae+pdf, is suspicious and likely part of this scheme. ClamAV and ML heuristics also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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://baarspo.ru/award?keyword=descripcion+de+la+familia+asteraceae+pdf PDF link annotation
- http://luziniwanemek.sportsontheweb.net/fonetodudiwadew.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/mafavuzenoliki/43476734396.pdfIn PDF document text
- http://tavamikilav.myartsonline.com/janenenibalivemo.pdfIn PDF document text
- https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_6671e9039bee488db07954f0006f2cc5.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/gajakelegeza/89526172894.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f57b8d40-f202-4c33-9ee5-c77deb66f725/31791168738.pdfIn PDF document text
- https://b5c90759-dbf8-4ccd-b12d-e23c958527f9.filesusr.com/ugd/915a55_3efffe9f9e0e4107b8063a3c873ba508.pdf?index=trueIn PDF document text
- https://5a060084-92f5-4e09-b02e-bbac8bb45871.filesusr.com/ugd/05c943_0aace932fd014b21949583c4f4f883d7.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/tudawufed/slidehunter_ppt_templates.pdfIn PDF document text
- https://21c505bb-01ca-4817-a549-4ed1ebba5040.filesusr.com/ugd/7d7105_3767831699764e67baed32f3c734468b.pdf?index=trueIn PDF document text
- https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_1076cf14204d45e6b444d7e726bb39ac.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/daraniwekamidir/28889828059.pdfIn PDF document text
- https://s3.amazonaws.com/simujix/ultrasound_guided_barbotage_calcific_tendonitis.pdfIn PDF document text
- https://7704dd35-2db2-4ca2-aa08-348d3b961acd.filesusr.com/ugd/84a5c6_e8e9c893cd1f46b398887acb5b1076a6.pdf?index=trueIn PDF document text
- http://xafibejijopo.atwebpages.com/mean_value_theorem_examples.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dfb0356e-dee5-4f72-b77b-9a1d84d012e1/how_to_train_your_dragon_3_full_movie_not_trailer.pdfIn PDF document text
- https://3d9856c9-ddaf-40ef-ab37-14107f3d3ee7.filesusr.com/ugd/938106_1aa319c0e77c40c3ab0d9660f9b72d22.pdf?index=trueIn PDF document text
- https://2d2b1dae-c014-4902-97e6-c3f1d56915cd.filesusr.com/ugd/70e5f7_2cda34b7c80741ef85edd89ba0ccc4f7.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/6385dcc2-7a83-4284-b563-15288bcacf4b/how_did_pangea_split_up.pdfIn PDF document text
- https://s3.amazonaws.com/fokapikow/cestina_express_2.pdfIn PDF document text
- https://s3.amazonaws.com/xamibudasagas/73113853722.pdfIn PDF document text
- http://koxolavomuzo.myartsonline.com/xibanudi.pdfIn PDF document text
- https://s3.amazonaws.com/tutasujal/barasuara_pikiran_dan_perjalanan_album_rar.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0001103c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1103C	5088 bytes
SHA-256: `edffc732f3597dc3151d3361cc6aba785b73037cf0b9977936995185fba4ad9b`
`font_01_sfnt_off00012168.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12168	12376 bytes
SHA-256: `12d2c1db18ea49a33687d4da18994f9488a5c98b3d8711bea7e2d5ddf3078939`
`font_02_sfnt_off00014986.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14986	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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