PDF malware analysis — malicious · b72973c41992c7b0

MALICIOUS

PDF

77.4 KB Created: 2021-03-05 23:47:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: 55bef72f37b936ae4668ac5e66749669 SHA-1: 61b21d8992dda351f75f2299488f664c9f1d4bc2 SHA-256: b72973c41992c7b0b2cde3ab9008c8f5d399a4c46dee959107bc31514f74ba22

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, 'jumiwimov.ru', which is likely part of a lure to trick users into downloading further malicious content or revealing sensitive information. The document body, though heavily obfuscated, appears to contain metadata related to its creation, including the search query that likely motivated its generation.

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://jumiwimov.ru/wb?keyword=salesforce%20for%20dummies%202019%20pdf PDF link annotation
- https://cdn.sqhk.co/zirigajer/tifdhfu/8583400559.pdfIn PDF document text
- https://cdn.sqhk.co/babakobesuxe/ggjjie0/teppen_card_game_wiki.pdfIn PDF document text
- http://tikutajufa.22web.org/hormones_and_endocrine_system_worksheet_answers.pdfIn PDF document text
- https://cdn.sqhk.co/bevurokakug/fhi7jhr/lesson_teacher_app.pdfIn PDF document text
- http://allostar.buzz/essential_neuroscience7rml9.pdfIn PDF document text
- http://badgesverified.com/539913819574wc21.pdfIn PDF document text
- https://cdn.sqhk.co/lejesapazud/ij7jj1I/79733834467.pdfIn PDF document text
- https://cdn.sqhk.co/nuzitomizaj/yheigif/disneyland_paris_annual_pass_phone_number.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://409b2d23-5c1d-402e-97df-26c0da9299b0.filesusr.com/ugd/2e3d42_a82cca9c746044918606dab633877f74.pdf?index=trueIn PDF document text
- https://435a888a-8f80-410d-aa77-77edd6e4491d.filesusr.com/ugd/51fec0_b198a4e69e8547c58afe0b87d467112f.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/308a54b7-7979-452b-ac5f-6ce06152624e/13950971443.pdfIn PDF document text
- http://dereduvate.epizy.com/tojuv.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d74cdb89-b6c4-4ea4-99b9-fd18f963e2c1/97325423907.pdfIn PDF document text
- http://gidozowelixije.rf.gd/fapowudomosikulifusenin.pdfIn PDF document text
- https://ac614e2c-2e00-43e4-a80f-2c6bce9fb64b.filesusr.com/ugd/f103bb_9780c476e36f4ea0b4aab5001b838b38.pdf?index=trueIn PDF document text
- http://wemudubapekixe.rf.gd/ryobi_18v_lithium_battery_charger_manual.pdfIn PDF document text
- http://wosesulejebus.epizy.com/bachelor_party_invitation_email_template.pdfIn PDF document text
- https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_3516ba1d8a95471395cbc5b55fc50ff2.pdf?index=trueIn PDF document text
- https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_685a9377461b40268907b49465a3c336.pdf?index=trueIn PDF document text
- https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_01875265a021474eb6193260057df254.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/841fe178-5cbe-4bf0-8297-02fb9bc9d8cf/how_do_you_use_a_digital_temple_thermometer.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_off0000e460.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE460	5584 bytes
SHA-256: `aee6655c68343115270f3dfc7c6929789f4a80ee4d5ba15365b3577d829b03c8`
`font_01_sfnt_off0000f74a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF74A	10192 bytes
SHA-256: `cb3e22026ef4ebff1f09b322fde5e9b3ca7134e2e60d83341abf622c6801716b`
`font_02_sfnt_off000119fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x119FE	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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