PDF malware analysis — malicious · 8e91c5a37d369341

MALICIOUS

PDF

83.8 KB Created: 2021-03-24 15:08:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13

MD5: d85cec142f37d1348c6b565ca5d9dc2b SHA-1: 340729c918e301afa79443877e1d15d90c157c6a SHA-256: 8e91c5a37d3693413aed149413698e49f240969367b6cde1ee53cb1f003b3260

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains embedded URLs that redirect to potentially malicious domains, as indicated by the 'PDF_URI' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a common tactic of luring users to external sites.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://pelibifir.ru/123?utm_term=delish+zucchini+baked+ziti+nutrition+information PDF link annotation
- http://alcozerox.com/super_jungle_world_runcq7zi.pdfIn PDF document text
- http://winfreeiphone.xyz/gimuweronujb93py.pdfIn PDF document text
- http://outputqwvk.space/727801627336n614.pdfIn PDF document text
- http://muzoc.xyz/58673707041ybcyj.pdfIn PDF document text
- http://bufibinokurun.scienceontheweb.net/rationalize_the_denominator_worksheet.pdfIn PDF document text
- http://leree6.club/the_hunger_games_catching_fire_full_movie_online_putlockersabdjx.pdfIn PDF document text
- http://storezone.info/excel_vba_mid_instrrev02l2n.pdfIn PDF document text
- http://xumupizaxuto.scienceontheweb.net/70109789952.pdfIn PDF document text
- http://ergors.space/lupifoxoparejnsjo.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/nowokil/77010918670.pdfIn PDF document text
- http://wezekopufoj.rf.gd/gift_certificate_template_online_free.pdfIn PDF document text
- https://6438efa2-cbc3-4905-bec7-85cdafd94a34.filesusr.com/ugd/d1cf8b_b3c22aacef234b6ca8be1a599431a0d0.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/kumasala/70933615712.pdfIn PDF document text
- https://49b821e7-ee7e-41b4-809b-d0417b8c1ddf.filesusr.com/ugd/927743_83ac5cba2e6245f48cb508db3bad9d99.pdf?index=trueIn PDF document text
- http://jirabasojexosud.atwebpages.com/stages_of_green_revolution_in_india.pdfIn PDF document text
- https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_089bfe46997a4496b565e0b38c5c30ef.pdf?index=trueIn PDF document text
- https://17c3d818-7f64-4152-976a-2fa997d7a7be.filesusr.com/ugd/e2c250_777482af9b19437087852c17ef948fdd.pdf?index=trueIn PDF document text
- http://tidovaj.epizy.com/bozoledisodu.pdfIn PDF document text
- https://s3.amazonaws.com/vezumobigodub/altium_designer_with_crack.pdfIn PDF document text
- http://xenexafa.myartsonline.com/koboworotawodubudulo.pdfIn PDF document text
- https://s3.amazonaws.com/wivunonovef/23058592292.pdfIn PDF document text
- https://b1c30c75-ab46-439a-884d-3836ae4b8a49.filesusr.com/ugd/2d1648_de477d7e8f95406eb5765b7e36aaf6d9.pdf?index=trueIn PDF document text
- http://dufobirufo.atwebpages.com/68627451163.pdfIn PDF document text
- http://vosikixu.rf.gd/how_to_play_age_of_empires_3_on_windows_10.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_off0000f23f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF23F	5516 bytes
SHA-256: `f06726d210851cc77fd7bc38a54f53dbed73ee4a2eb00e46a6d9946242d1ffe6`
`font_01_sfnt_off000104df.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104DF	11212 bytes
SHA-256: `d34bd6e08421d1a40b8e47e895bcca55040b60b6e1519ca732316847bea00cac`
`font_02_sfnt_off00012b55.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B55	16312 bytes
SHA-256: `aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0`

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