PDF malware analysis — malicious · f04166909c0188ef

MALICIOUS

PDF

88.5 KB Created: 2021-04-08 09:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 5d965bdb1b9260ef55ba5a07ba7e4653 SHA-1: a672b00a9403f9d932b5f1aa66c1f3cde18f970e SHA-256: f04166909c0188ef50036e89f71abd03dc3d3762e94deac5189e9b00c8ce1240

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. The primary malicious URL identified is dugedepap.ru, which is likely used to host a phishing page or download a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/strik?utm_term=audio+technica+lp60xusb+manual PDF link annotation
- https://cdn-cms.f-static.net/uploads/4368488/normal_600dc4192e271.pdfIn PDF document text
- http://fikapopupalake.iblogger.org/52728573487.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374704/normal_6027cec899d58.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4452392/normal_60237b901d871.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4500453/normal_5fe3f67c37cc7.pdfIn PDF document text
- https://cdn.sqhk.co/xozirijor/Qp2hggh/domain_name_availability_api_free.pdfIn PDF document text
- http://pevojatinolotej.22web.org/hp_deskjet_6830_printer_driver_download.pdfIn PDF document text
- https://cdn.sqhk.co/janezewufaj/htZ7cgd/homemade_ice_cream_recipe_with_eggs_no_cook.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382631/normal_606536fc61cea.pdfIn PDF document text
- https://cdn.sqhk.co/mifopanikil/Zidha0c/69835397435.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://3315be42-5dab-4b6e-b44d-105cb490973e.filesusr.com/ugd/2e3488_d156051b2f76430c9ef43b15d30c3caf.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/sosupejuxofedo/cuanto_equivale_un_metro_cubico_en_centimetros_cuadrados.pdfIn PDF document text
- https://680e7e7f-99bb-4309-8a01-ecc910dc7690.filesusr.com/ugd/717a42_d01b293cebbe44f4a48297f5b2c097a1.pdf?index=trueIn PDF document text
- https://535a9070-e28a-464b-adc5-c02ad08be00b.filesusr.com/ugd/9df9d6_1bc8f8a20ab44351bee020df96aa2196.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/navoburarovada/dokepovasepekomafanavu.pdfIn PDF document text
- http://jatodilo.epizy.com/causes_of_poverty_in_pakistan.pdfIn PDF document text
- https://s3.amazonaws.com/diwitapezu/john_deere_4045_engine_parts_catalog.pdfIn PDF document text
- https://e1318bff-d970-45e2-bcea-45481503a18b.filesusr.com/ugd/75a96d_5d678ee66d9846c5a53b79e7e686c140.pdf?index=trueIn PDF document text
- https://4c2674ec-1430-4cec-a455-d6a35d10586e.filesusr.com/ugd/38955b_fdae9e16476f45f9957aa758db2c6123.pdf?index=trueIn PDF document text
- https://11627308-8c8f-4f08-99ed-0ad85160907d.filesusr.com/ugd/682d1c_e7c5c85905124c0898952d1af1715673.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/bogijexu/gololezolumakuma.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_off000103f5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103F5	5712 bytes
SHA-256: `11deae9472dac389239c5043d4a71d185a1a8902365e9c53f117f20d5740af42`
`font_01_sfnt_off00011735.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11735	11836 bytes
SHA-256: `08879f493033dc32d3f9fd54abe6132ea395902640710af35fedaa6c40ebe95a`
`font_02_sfnt_off00013f2b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13F2B	16204 bytes
SHA-256: `532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e`

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