Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3f12109b768c35c…

MALICIOUS

PDF

79.2 KB Created: 2021-03-31 14:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 820e1a7d9da43625b6a37a6f77534fe0 SHA-1: 11d7cb30080f2a75fff3747ac6504bd78932d6b4 SHA-256: f3f12109b768c35cbb629ca807b6b5a6d36fac4384c26bdad95f125334b7cecd
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a phishing or malicious redirection attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests it's designed to lead users to potentially harmful content. No scripts were extracted, but the overall structure and URL distribution are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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/strik?utm_term=poulan+pro+snowblower+electric+start+kit PDF link annotation
    • http://netewe5.xyz/xibuxisepuledwzy7.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/sij3jjL/master_the_police_officer_exam.pdfIn PDF document text
    • https://cdn.sqhk.co/toriwogadej/nhadgcf/gebavotinufulaxisixex.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/giihUsM/23187729267.pdfIn PDF document text
    • https://cdn.sqhk.co/votiwixuduzo/h4jCO5Q/making_international_calls_to_usa.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/JeOiahe/coin_master_free_cards_hack.pdfIn PDF document text
    • http://lnstagramcopyrightservices.org/scofield_study_bible_1917_editionoaub9.pdfIn PDF document text
    • http://arm-watch3.club/7718469889zbug4.pdfIn PDF document text
    • https://cdn.sqhk.co/tiviluluje/PvjfTgc/suxixanawe.pdfIn PDF document text
    • http://normab-id.com/112929738348cjvt.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/igESjfi/wisconsin_duck_hunting_zones_map.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/NjatTRp/friends_build_tiny_home_community.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zamuriza/69371716798.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/kaloxoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/629f1b25-542e-42dd-95ca-add3bdd86b93/1727471699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbfd76bd-154a-4b58-ad79-29505033dc0c/what_kind_of_poem_is_neutral_tones.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/antz_general_mandible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84a1d16e-4925-41c9-a41f-521ed82b92b4/public_relations_job_description_and_salary.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/types_of_non_conformance_iso_9001.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/hp_elitedesk_800_g1_tower_ram_upgrade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35f65697-44a4-42c0-b7b7-7e68819a2394/54352071343.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_off0000faa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA3 5224 bytes
SHA-256: 9ff47deb24e770e39f8031fc78f76a7773ba377c834ffd82c00e392e09ba993a
font_01_sfnt_off00010c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C84 10208 bytes
SHA-256: 84e1007da9151ac5e7da4a8a281897140de1b3eb2553feed1e5852a2111f26f1

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