Malicious PDF — malware analysis report

Static analysis result for SHA-256 927bcbd8099f78d0…

MALICIOUS

PDF

72.3 KB Created: 2021-02-06 08:54:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 28762f8eca458fc0218bfffa44ba147a SHA-1: 51e83b93ea2d29ed4896406e1984cd2b9a2ce1bf SHA-256: 927bcbd8099f78d0a92e2bcd164ae0fcf6fa404e727a0a45150cf612bc17b085
186 Risk Score

Malware Insights

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

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 0.9997

Heuristics 6

  • 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 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://jottigo.ru/aws?utm_term=cara+main+multiplayer+gta+sa+android+offline PDF link annotation
    • https://cdn.sqhk.co/jufebarur/iK8mjcR/slifer_the_sky_dragon_limited_edition_lc01-_en002.pdfIn PDF document text
    • https://cdn.sqhk.co/dasekizob/fzjc3GX/bakovojasekowodiw.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimoxifagi/eRuheob/distraint_pocket_pixel_horror_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/sebazisop/iPJPidI/emulator_for_ps1_android.pdfIn PDF document text
    • http://gladkoe-telo.xyz/srinivasa_govinda_mp3_song_downloadfrmpo.pdfIn PDF document text
    • https://setupazaz.weebly.com/uploads/1/3/4/7/134772318/9f1ff224624fbc.pdfIn PDF document text
    • https://cdn.sqhk.co/regomesu/hGhehdZ/toy_cars_for_toddlers_to_ride.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/jchjhjn/gonodaxojovezaxexazakiji.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/f8qAmhj/disovu.pdfIn PDF document text
    • https://cdn.sqhk.co/geroterunetu/ithcgfQ/craftex_dust_collector_model_b1140.pdfIn PDF document text
    • https://cdn.sqhk.co/sewujuzanas/idLp8jc/shoot_zombies_with_paintballs.pdfIn PDF document text
    • http://onlajn-kassa.ru/puzzle_and_dragons_3ds_wiki41rf7.pdfIn PDF document text
    • https://cdn.sqhk.co/votijavos/ggiD9oh/nuduj.pdfIn PDF document text
    • http://copyrightnotices-form.com/fashion_show_playlist_2019mtcui.pdfIn PDF document text
    • http://jumpfs.space/akbar_birbal_stories_in_marathi_freer0rb2.pdfIn PDF document text
    • https://tupokigefadewun.weebly.com/uploads/1/3/4/7/134702618/2600762.pdfIn PDF document text
    • https://gogesixemaso.weebly.com/uploads/1/3/2/3/132302802/xikebetazuxebiwar.pdfIn PDF document text
    • https://cdn.sqhk.co/korulifesewa/hdggFh4/vezesizuzizenisogawa.pdfIn PDF document text
    • https://cdn.sqhk.co/parabeset/ghigggD/93117741722.pdfIn PDF document text
    • https://cdn.sqhk.co/dufikibagi/nMTgeIr/list_all_solitaire_card_games.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/rikolesafuwofar/28821741336.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_off0000d64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64C 5368 bytes
SHA-256: f78ac3f9fd8931c8db791239192f3826e718a30a0fa28268cf1731b54e37bd06
font_01_sfnt_off0000e885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE885 13640 bytes
SHA-256: f2ec67a480674135ff4c696d8be200fcc632aef3add245d03672ecbf1acd4678

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