PDF malware analysis — malicious · da6427f17815ae02

MALICIOUS

PDF

81.8 KB Created: 2021-03-18 23:11:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02

MD5: 503148875e08d35dde836ec62f72a87a SHA-1: 61bb3074a749c1f2b62ca0a27d323e61cef66503 SHA-256: da6427f17815ae02095819e4f4245a5f1eea1627d91589bab8e679d554af6e8a

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to 'soxebez.ru', suggesting a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by indicating the PDF is part of a link farm on disposable hosting, likely to obscure the true destination.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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 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://soxebez.ru/award?keyword=list+of+occupational+diseases+pdf PDF link annotation
- https://static.s123-cdn-static.com/uploads/4417123/normal_60094c2bd281c.pdfIn PDF document text
- https://cdn.sqhk.co/rapovebakeb/KIjaNQo/wikimedia_commons_paintings_by_artist.pdfIn PDF document text
- https://cdn.sqhk.co/jigotove/lQhfjcR/87753346607.pdfIn PDF document text
- https://cdn.sqhk.co/xudadidi/1id4tSM/nitabativapivizazevibug.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418574/normal_601bdec30bfe9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416332/normal_602a2e4cdfbb3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375507/normal_60158fc19fd16.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4372681/normal_6008fc48c5f58.pdfIn PDF document text
- http://nekidifuton.medianewsonline.com/washington_football_team_score_last_night.pdfIn PDF document text
- https://cdn.sqhk.co/gabazumad/1zM65h5/zimofuxudomojufelew.pdfIn PDF document text
- https://cdn.sqhk.co/pejinijew/mifEIic/best_way_to_learn_lightroom_cc.pdfIn PDF document text
- https://cdn.sqhk.co/ruvivifid/jjyukKv/fazusabugumuvir.pdfIn PDF document text
- http://duxinivodozular.mywebcommunity.org/92227509657.pdfIn PDF document text
- http://bomaduworofa.medianewsonline.com/55410556137.pdfIn PDF document text
- http://jomikifu.medianewsonline.com/26280649319.pdfIn PDF document text
- https://cdn.sqhk.co/kufalavoxig/wEcihhb/primark_neon_snake_print_dress.pdfIn PDF document text
- https://cdn.sqhk.co/rutisifelom/4vD7Eij/4_pics_1_word_6_letters_red_carpet.pdfIn PDF document text
- https://cdn.sqhk.co/labifikup/gYd4mUr/schema_electrique_interrupteur_ampoule.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/601dc9df-c6a4-4342-8eec-c6547c55702b/kuwutijavobig.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/13c5638a-acff-4e97-afd8-ef7fd2ef1df0/kurilinaxetosok.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c6ec4876-c383-4054-b203-f45b9ef50e86/molajune.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a794c144-ac7a-44ac-80ac-fe33ba034fed/plato_books_list.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f9775e11-6400-4d71-9865-4835939cc496/watch_game_show_network_live.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f4a5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4A5	4876 bytes
SHA-256: `7f8d3a3484fa515d521c66ebd35ef8765407b9475d61adfcec8fe9b7e5e6e87b`
`font_01_sfnt_off0001054e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1054E	11928 bytes
SHA-256: `0f6873b1fba85d33d2d403249698d33210445447a84a90e9cbb007dbc69dcea6`
`font_02_sfnt_off00012b28.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B28	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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