PDF malware analysis — malicious · 69ae9a0835b3b20a

MALICIOUS

PDF

75.7 KB Created: 2021-04-02 00:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10

MD5: 4f738f6e8441c742467b3011ef53d89f SHA-1: 4d47b838736846f6337f750e9adf464253be0c14 SHA-256: 69ae9a0835b3b20a22705a99da8a770e48b334466a78d6bd7a3369db79deb913

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF document flagged by ClamAV as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of external links is a strong indicator of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/wix?keyword=youtubers+life+cheats+android PDF link annotation
- http://peramabejakes.sportsontheweb.net/converting_kindle_content_to.pdfIn PDF document text
- https://cdn.sqhk.co/dojidavos/cQhfigV/87468576269.pdfIn PDF document text
- http://tadurarawi.mypressonline.com/gugopizekuzisiwaga.pdfIn PDF document text
- http://pakawuwujawo.getenjoyment.net/rumowivifegilatapegorose.pdfIn PDF document text
- https://cdn.sqhk.co/kegimovotol/rjcjajb/bare_bright_copper_prices_in_texas.pdfIn PDF document text
- https://cdn.sqhk.co/dejogaxotuti/icGbisz/export_bookmarks_chrome_android.pdfIn PDF document text
- https://cdn.sqhk.co/lanumakefu/iiicV8h/pubavigima.pdfIn PDF document text
- http://lipexifinidoda.scienceontheweb.net/diablo_bestiary_the_book_of_adria.pdfIn PDF document text
- https://cdn.sqhk.co/kerosumumato/haigkUx/sim_toolkit_app_remove.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://s3.amazonaws.com/xamibebulosaxug/lojezigulajoko.pdfIn PDF document text
- https://s3.amazonaws.com/wuwabobujasivor/mechanical_engineering_multiple_choice_questions_and_answers.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/04d87da2-7d8c-47ce-a54f-9e5de98db13c/xunuvijilasisu.pdfIn PDF document text
- https://s3.amazonaws.com/tokit/formation_affaires_reglementaires_cosmetiques.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9ce3c517-cce9-4662-bef0-d038aba899f6/literature_an_introduction_to_fiction_poetry_drama_and_writing_8th_edition_table_of_contents.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/633ebc9e-d645-4f37-b2a5-24162a39e169/biwafovakirutobalonojop.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/99a5f51e-6bcc-4bdb-8dd7-e2fac0651c99/83196054864.pdfIn PDF document text
- https://37bcb4aa-7747-4ff6-a352-0e22bf983c21.filesusr.com/ugd/4393d3_192e57104cd842fc9f9268eaeea12125.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/topipovikapari/kerala_psc_english_grammar_questions_and_answers.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/489c7070-8c48-45d8-b158-d30c72fddab3/29621806482.pdfIn PDF document text
- https://804b95bc-9ca4-448d-a094-5a8e1ff69a26.filesusr.com/ugd/99d1da_f63071f829204b6ea16d14fea69889d3.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/686f5558-26f2-4f71-a68b-6806b747f9b6/pokof.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_off0000dfa6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDFA6	5092 bytes
SHA-256: `1629df70d62d299b25ffbd76ac812ddcd934acfefe2bfa46efb5b3408e01a9f3`
`font_01_sfnt_off0000f0e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0E4	10068 bytes
SHA-256: `f30021fbe801e0ea05f2ba7acd8c443d17bd1d66d8ef69e3fbbf7168cedbd163`
`font_02_sfnt_off00011353.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11353	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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