Malicious PDF — malware analysis report

Static analysis result for SHA-256 10599aab68bff11a…

MALICIOUS

PDF

75.9 KB Created: 2021-04-04 12:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: da6d95902f0acb4605428cdd26543479 SHA-1: 2e9279fcf65da7568112b2a5bea9527d372ae1f4 SHA-256: 10599aab68bff11ac7969389c0f0e460c63aab9b44ede6a96bd355d70a35675c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=button+submit+outside+form+html PDF link annotation
    • https://cdn.sqhk.co/nepopagugela/aiithjK/59107249960.pdfIn PDF document text
    • http://coupons2020.info/the_game_changers_film_online_subtitrat_in_romanaxqm1w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415964/normal_6067c1a59c1bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415950/normal_605684a01995d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388825/normal_5fdf3cff4c021.pdfIn PDF document text
    • http://mexicotop3.xyz/wasepekafometibil2gzco.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/ehafy5U/88593468108.pdfIn PDF document text
    • http://itsamorem.com/after_we_collided_full_movie_release_date_netflixq60d5.pdfIn PDF document text
    • https://jarosebat.weebly.com/uploads/1/3/4/6/134695718/lemewetutedom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472760/normal_5fdff9161ab57.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://zudejafig.weebly.com/uploads/1/3/2/6/132681624/voxumejepugub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1699752-4433-48ed-863b-f68c0a0358e2/jack_reacher_series_amazon_season_2.pdfIn PDF document text
    • https://2ed9768e-82a7-41f7-bc91-4b86d8d7aa0f.filesusr.com/ugd/bdbd91_663518d40bcc4ba78d49445884eb06b3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/68624946-b6c5-4fef-894b-d1c892afdf0c/easy_songs_to_play_on_piano_for_beginners_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d54250dd-bb4f-4289-a0a7-d2aa71101d53/gog_extcy_solenoid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ca553b6-d137-47f6-82cb-c4a96764f3b2/aldo_leopold_sand_county_almanac_quotes.pdfIn PDF document text
    • https://e209d09f-5af8-48a0-acfc-72d03e9bea0d.filesusr.com/ugd/946fcc_ba375ae23bc2493f98eac3a3ce939460.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8A 5128 bytes
SHA-256: 3c8c973e9bbf616473526811ddf2883932563150092d69caf805908e884ac2d3
font_01_sfnt_off0000eec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC3 2848 bytes
SHA-256: d37f9b1056f98732899c6985f68cc16238431fa0754f2d0b4ffdcdeee6025fc5
font_02_sfnt_off0000fae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE2 11444 bytes
SHA-256: 2d6cbfb7ff21bfb00c36cbceceaa350801e5dae97dbd69ecabddf82b8e1a1d89

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