PDF malware analysis — malicious · 299ae573edf4f833

MALICIOUS

PDF

108.7 KB Created: 2021-03-15 02:47:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c239f50e876af56fe64aa684ee8984ba SHA-1: 1835674b0c6ac835597fa9d0f9d7afb500499e85 SHA-256: 299ae573edf4f833655117ea0d73681d2f359bf2092a90c5fc8973e3345d1d38

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. ClamAV and an ML classifier also flagged this PDF as malicious, specifically as a phishing or trojan variant. The presence of numerous external links and the nature of the primary URL suggest an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9941

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://jottigo.ru/strik?utm_term=what+does+stand+fast+mean
- https://cdn-cms.f-static.net/uploads/4369782/normal_5fe7c1631103f.pdf
- https://zifofuxe.weebly.com/uploads/1/3/5/3/135386801/badaxoxidapon_segigoxulijazig_betutenini_juwutamepavefup.pdf
- http://qwertyujg.xyz/nimoxofojuzarukuzoxafejr88wn.pdf
- https://static.s123-cdn-static.com/uploads/4379611/normal_5feef6b93376e.pdf
- http://xozonline.ru/strategic_management_study_guidensnkf.pdf
- http://rigewojugofalas.iblogger.org/xeseremifinipagav.pdf
- http://modernstyle.pro/womigivudugof7hauy.pdf
- https://cdn-cms.f-static.net/uploads/4419192/normal_5fd62ae4d4d5e.pdf
- https://static.s123-cdn-static.com/uploads/4421613/normal_600111432b8c5.pdf
- https://giweberemep.weebly.com/uploads/1/3/2/6/132682555/4623915.pdf
- https://romenazojojeles.weebly.com/uploads/1/3/0/7/130775884/dobunodobufi.pdf
- https://cdn-cms.f-static.net/uploads/4379046/normal_601f2ba63df4d.pdf
- https://cdn-cms.f-static.net/uploads/4366627/normal_604891b998610.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://fedorahosted.org/lohit
- http://www.opentle.org
- https://s3.amazonaws.com/vuzufexarevima/best_volume_booster_app.pdf
- http://motirovaribepok.rf.gd/predicting_ionic_charges_worksheet_answers_4._15.pdf
- http://lozepis.epizy.com/worship_songs_sites.pdf
- https://s3.amazonaws.com/budovewesekaz/flower_of_life_mandala_stencil.pdf
- http://fabonek.rf.gd/nier_automata_revealing_outfit_guide.pdf
- https://s3.amazonaws.com/dufekifaral/sweet_chili_sauce_nutritional_information.pdf
- https://s3.amazonaws.com/wewuxuviwar/guelph_real_estate_market_report.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
- http://scripts.sil.org/OFL
- http://www.gnu.org/licenses/gpl.html

Extracted artifacts 9

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_009_off0001774f.bin` `3dba3fb2ca5d26c25be5a840fb9e2a7fcfefd4829dc7240fc0671df36674e8d1`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1774F	18240 bytes
`font_00_sfnt_off0000ef3b.bin` `b860fb277252ee9b20429d811032d938c2d219a75430a49174b6e9a82640b652`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF3B	5684 bytes
`font_01_sfnt_off00010318.bin` `500b887745c01c1dd7f2af793c2b5bccef414cd2f79435944a7726ecbe2716ce`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10318	5032 bytes
`font_02_sfnt_off0001141f.bin` `c206ac4eca120f096112d408dff6b33a2f721090936d80486df636e1cd240fde`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1141F	2656 bytes
`font_03_sfnt_off00011f25.bin` `3702365b3034b9d7945da23b991b5e2ac3f8bb06d1ba3be7e5ba1b5d8dd48c9f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F25	2328 bytes
`font_04_sfnt_off000129dc.bin` `e66bd646ff29f48b94a898642357a1d5295b77faffa0bd70eb77acb4aebc9a97`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x129DC	2108 bytes
`font_05_sfnt_off000133a8.bin` `eca62b72654736461a635ba366d09d794777fd95c58152d2b251becdfce657e0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x133A8	6640 bytes
`font_06_sfnt_off00014545.bin` `5de0e3b3d2735ef7672c11ecfa57cf2266980c5274325f5424cc2f5685af09ad`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14545	16384 bytes
`font_08_sfnt_off00019454.bin` `51c1d5fa29146058fbc649eac7766b85490f6942bd67486bd14cc46e9087474c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19454	3276 bytes

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