PDF malware analysis — malicious · e78d0537ba89b9e0

MALICIOUS

PDF

78.7 KB Created: 2021-05-23 07:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30

MD5: fca5c3c8e21441113ad0d6fb21fbc36e SHA-1: 1afc6ee61eb018c5fdc8e5b09b0e5980e86723e1 SHA-256: e78d0537ba89b9e0a17b027659a322d53a3fd4f039d639fd7a36b70ec79a012f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. The primary external URI points to a URL that includes a keyword search, suggesting a lure to a potentially malicious website. While no scripts were directly extracted, the PDF structure and the presence of external links indicate a likely attempt to redirect the user, potentially for phishing or malware delivery.

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/wb?keyword=my%20kaplan%20mcat%20login PDF link annotation
- https://static.s123-cdn-static.com/uploads/4490132/normal_5ffd44ff39080.pdfIn PDF document text
- https://folejate.weebly.com/uploads/1/3/4/9/134902611/xilovonunowo-netunaloku.pdfIn PDF document text
- https://totamozosapopa.weebly.com/uploads/1/3/4/7/134712517/5dc0d18f7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393362/normal_60679be33f9d3.pdfIn PDF document text
- https://zamidagotef.weebly.com/uploads/1/3/1/4/131453459/5667309.pdfIn PDF document text
- https://worofinuwur.weebly.com/uploads/1/3/4/5/134582463/pumat-dikizejem-fupokulevawoki-sovek.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4384160/normal_5fe8e9577b49e.pdfIn PDF document text
- https://mapulanedubo.weebly.com/uploads/1/3/0/9/130969056/tufodutozobimo_ravevumanex.pdfIn PDF document text
- https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/6ce2c1793.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4384460/normal_600744e9c0e57.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4418747/normal_600482d6565fe.pdfIn PDF document text
- https://lupakekurusope.weebly.com/uploads/1/3/4/6/134652685/4322722.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/f644e9a6-dce1-403d-9c67-af4a05c3f51a/is_fusion_360_free_to_download.pdfIn PDF document text
- https://s3.amazonaws.com/nokiva/47852050562.pdfIn PDF document text
- https://s3.amazonaws.com/xokebore/75591733510.pdfIn PDF document text
- https://s3.amazonaws.com/gagotaniwipure/basic_mathematics_serge_lang_contents.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d4578e7d-496f-4200-97a7-9f9ffb202c0f/duzipomevinodekelawagasan.pdfIn PDF document text
- https://s3.amazonaws.com/xapijifas/agroecology_fao.pdfIn PDF document text
- https://s3.amazonaws.com/jizubisetebof/royal_caribbean_drink_package_deals.pdfIn PDF document text
- https://s3.amazonaws.com/rezugekolaba/how_do_i_fix_my_whirlpool_duet_f20.pdfIn PDF document text
- https://s3.amazonaws.com/ruzumeb/what_is_the_best_5500_watt_portable_generator.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/07b1100c-d371-4075-bfa1-12584d9e0ff4/28119417831.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2d09054e-f98a-43d0-a142-24bf63be2051/bujuxupukefesudasejevam.pdfIn PDF document text
- https://s3.amazonaws.com/girilifawuxi/how_to_reset_my_sentry_safe_code.pdfIn PDF document text
- https://www.kaptest.com/mcatIn 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_off0000df64.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF64	5152 bytes
SHA-256: `241ed2eef68d328997092606964c2248c4010ac441132d920511238a09f8b4eb`
`font_01_sfnt_off0000f0fa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0FA	11436 bytes
SHA-256: `01ed266d74cba28b1461213ebbb55e46f2817dc514fc3d7578d3db7bb722f3fc`
`font_02_sfnt_off00011838.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11838	16144 bytes
SHA-256: `2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174`

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