Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd329705b055c9b1…

MALICIOUS

PDF

76.1 KB Created: 2021-03-15 05:32:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6743c99a3d1334ac2f71636d22e8ab41 SHA-1: ce6e9babc754892002ee1efc0ce5312440f646a7 SHA-256: dd329705b055c9b199f0799cdfca7989c91d604343bec14f0e9108ef97ea9ab3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document functions as a link farm, directing users to various external PDF files hosted on disposable domains. The primary URL, 'https://soxebez.ru/wix?keyword=pickens+county+sc+arrest+warrants', suggests a deceptive lure to attract users searching for specific legal information. The ML classifier strongly indicated maliciousness, and the structure points towards SEO manipulation for traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=pickens+county+sc+arrest+warrants PDF link annotation
    • https://dibekojiworibo.weebly.com/uploads/1/3/1/6/131637919/jonizuzizut.pdfIn PDF document text
    • https://tatajojaboxu.weebly.com/uploads/1/3/4/0/134040665/d3d2fd3.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/1766969.pdfIn PDF document text
    • https://cdn.sqhk.co/fufafetuno/fpkRKjc/20426545057.pdfIn PDF document text
    • https://fosuwelu.weebly.com/uploads/1/3/2/6/132695698/jitatupejatumajex.pdfIn PDF document text
    • https://laderorigeridag.weebly.com/uploads/1/3/4/3/134309938/6751278.pdfIn PDF document text
    • https://kogijusixi.weebly.com/uploads/1/3/5/3/135312463/dabeboj-ramedazijegaxed.pdfIn PDF document text
    • https://cdn.sqhk.co/bulunazi/cG10igz/26713412785.pdfIn PDF document text
    • https://pirusamu.weebly.com/uploads/1/3/1/3/131383726/bibupuwaju.pdfIn PDF document text
    • https://xilarurizajefa.weebly.com/uploads/1/3/5/3/135347329/xeratodixosa.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/hijiS4w/xatawelasinodujoxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_775509c4b1de4b20a76106610c0462bd.pdf?index=trueIn PDF document text
    • https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_f3ed8d8b117d4bb2a819f15384fb4f11.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/la_la_land_sheet_music_book.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/action_potential_steps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6adbc02-1f77-4721-9d1a-0405d44b3661/bajudumanas.pdfIn PDF document text
    • https://4abf464d-34d5-4c80-8de5-e64f30e04530.filesusr.com/ugd/8b3eb5_d199280792ca4b9fb6b69e3af6821fd8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nefunupu/sql_server_2014_free_64_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbfe5f7c-6f6f-447c-a5eb-c16e12404c83/the_magicians_season_5_episode_12_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/amadeus_dab_radio_manual.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE969 5020 bytes
SHA-256: 9a09e7e172558c65b2393d9d9f538f1f9a1bb6ca20b8db0a741c9c4e4e1dc81a
font_01_sfnt_off0000faa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA8 11412 bytes
SHA-256: ebc9423eb9ace152d5a69327bbf72654d9a5fbce6a30fc30e98208064fbd7b04

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