PDF malware analysis — malicious · 7ead9c35528f42b6

MALICIOUS

PDF

82.8 KB Created: 2021-03-19 00:00:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17

MD5: f972a88682afba59c38c371bec2ab076 SHA-1: d927b293c52a94e84c2ed20ff3c281aba161f50a SHA-256: 7ead9c35528f42b65dd91be682615d5815d1cd1271c1b287ca110b3bb49477f9

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was identified as malicious by multiple heuristics, including ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It contains numerous external links, with the primary malicious URL being https://midufefew.ru/award?keyword=negative+prefixes+game+pdf. The PDF structure suggests it's designed to host a link farm, directing users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

Heuristics 5

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://midufefew.ru/award?keyword=negative+prefixes+game+pdf PDF link annotation
- http://dipunag.getenjoyment.net/kamiramejelij.pdfIn PDF document text
- http://harmony-market.ru/baby_soothing_sounds8umc7.pdfIn PDF document text
- https://xuwukixirekut.weebly.com/uploads/1/3/5/9/135966502/6ae093fe58c9.pdfIn PDF document text
- https://xogofodaromaf.weebly.com/uploads/1/3/4/3/134387758/a30ed81.pdfIn PDF document text
- https://xebigami.weebly.com/uploads/1/3/4/6/134661154/denugi_bejixajokafalut_bosakumamodo.pdfIn PDF document text
- https://modulofironufi.weebly.com/uploads/1/3/4/4/134402713/e7a6e174b8e5.pdfIn PDF document text
- https://dofolemabumef.weebly.com/uploads/1/3/4/4/134458616/pugupiwi_zekuxu_gumodow_rudifaserutapef.pdfIn PDF document text
- http://believes.space/3958634525c19vp.pdfIn PDF document text
- https://tiguxenejizowi.weebly.com/uploads/1/3/4/8/134899735/2718851.pdfIn PDF document text
- https://ginixagizelak.weebly.com/uploads/1/3/5/3/135349131/5992961.pdfIn PDF document text
- https://bikujezojodu.weebly.com/uploads/1/3/4/5/134587809/9670792.pdfIn PDF document text
- https://loropigofog.weebly.com/uploads/1/3/4/5/134595907/larure.pdfIn PDF document text
- http://keep-travel.com/giluroriwofagidas4zvl.pdfIn PDF document text
- https://xelewutoritawi.weebly.com/uploads/1/3/1/0/131070131/bupunitomuvemani.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/sakaburepagase/how_do_you_fix_a_pendulum_on_a_grandfather_clock.pdfIn PDF document text
- http://jaweratiz.atwebpages.com/90865061185.pdfIn PDF document text
- http://sajomapujozokux.onlinewebshop.net/best_electric_pool_heaters_for_inground_pools_reviews.pdfIn PDF document text
- https://s3.amazonaws.com/wutezigojuxi/englewood_nj_police_department_accident_report.pdfIn PDF document text
- https://s3.amazonaws.com/vazisi/awadhesh_premi_2018_video_hdvd9.pdfIn PDF document text
- https://s3.amazonaws.com/padanivozeb/tivibuxibefozixawefoveju.pdfIn PDF document text
- https://s3.amazonaws.com/rixevozajixezos/33954442193.pdfIn PDF document text
- https://s3.amazonaws.com/baxegezivumi/castle_of_glass_video_mp4.pdfIn PDF document text
- https://s3.amazonaws.com/latufenaw/focusrite_scarlett_18i20_3rd_gen_driver.pdfIn PDF document text
- https://s3.amazonaws.com/posufij/are_burnham_boilers_good.pdfIn PDF document text
- https://s3.amazonaws.com/vebenok/22295011450.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e686.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE686	3144 bytes
SHA-256: `2a8644edc132e0963b9008685dd1a0178c66b77e606abf53e1f2dc30879e1446`
`font_01_sfnt_off0000f1a8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1A8	5428 bytes
SHA-256: `f80834a28c0821124c0081bae4b9d516f524a69906f5505c0f735cad0ac96231`
`font_02_sfnt_off0001041f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1041F	10228 bytes
SHA-256: `d06c5cc9df27a4b42552fdc7736a6f77d6b0b86c6d808dbf75ed74b70b08a21b`
`font_03_sfnt_off0001274a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1274A	16204 bytes
SHA-256: `541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501`

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