Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e7692cee7216103…

MALICIOUS

PDF

74.1 KB Created: 2021-03-28 15:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a0ae403cde203392efbba78819e0fb93 SHA-1: 634d65abe7364e73f9c45d7e859164279e00c45d SHA-256: 1e7692cee7216103fd1c2baeb9b594810a8fdfba33e1bbf2bb92a8e85df8a076
126 Risk Score

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 0.9989

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://zajinet.ru/award?keyword=algebra+2+common+core+teacher+s+edition+pdf PDF link annotation
    • https://cdn.sqhk.co/woxipepevati/wZbiey6/super_fabio_bros.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/Bibhbjg/youtube_offline_video_player_for_pc.pdfIn PDF document text
    • http://gubixazolela.sportsontheweb.net/48147332295.pdfIn PDF document text
    • http://zebiripu.mygamesonline.org/96610950564.pdfIn PDF document text
    • https://cdn.sqhk.co/guwezasov/jdibJ7u/gobagibogufudonat.pdfIn PDF document text
    • https://cdn.sqhk.co/wazofovam/hRjjhis/diwuzabutefak.pdfIn PDF document text
    • https://cdn.sqhk.co/mofinopedas/EeBhjc9/88945008971.pdfIn PDF document text
    • http://mirijesuwakug.sportsontheweb.net/focusrite_scarlett_2i2_3rd_gen_setup_mac.pdfIn PDF document text
    • http://pojapusevipuzu.mypressonline.com/87628541809.pdfIn PDF document text
    • http://tamigome.scienceontheweb.net/nezomi.pdfIn PDF document text
    • http://kemedejovon.getenjoyment.net/aepyornis_island.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://uploads.strikinglycdn.com/files/66c65945-e8af-4ce5-a01b-f215f2f8703d/lolipixomu.pdfIn PDF document text
    • http://roporuti.onlinewebshop.net/beautiful_in_white_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7be4ae9-fea3-4f3b-b80f-1874c4081af7/rorekewugobiwinojonod.pdfIn PDF document text
    • https://91313464-3f42-441e-b0e8-b27065d471ad.filesusr.com/ugd/ee9d3f_f0566cdbb30747308940f35386437637.pdf?index=trueIn PDF document text
    • https://ad843f61-c544-48d7-8cfb-3c048b9edb46.filesusr.com/ugd/0dd9ed_a89c075eecdc40fd8f1538d8e8bc9416.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/top_songs_2019_playlist.pdfIn PDF document text
    • https://0e733887-fd72-4d21-8b10-0a39cafbc931.filesusr.com/ugd/1e4d10_57211c2cce5f40568780845ba0f5bd40.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/guile_theme_piano_sheet_music.pdfIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_a26c8a56d2464c809b0ce8eab1735559.pdf?index=trueIn PDF document text
    • http://doriponesarom.myartsonline.com/adverbs_of_frequency_exercises_b1.pdfIn PDF document text
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_5050b6982012497d858ffe5b77f4e434.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7518a3b8-04f7-4176-9c24-d7050296b315/6060174677.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/kifoxewotofapevoxomozuruf.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/xekoruninexoladenukobolez.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.

FilenameKindSourceSize
font_00_sfnt_off0000d502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD502 5616 bytes
SHA-256: 8ab266220e6e14bdfbbc7ee7a57b32ece24889ffc968195d6a6f6c6ed0ff48a6
font_01_sfnt_off0000e7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D5 10148 bytes
SHA-256: 163c814985ac93d4b987e5141b93b84e3d5c38e6905b1faf56f95ac6c4f07445
font_02_sfnt_off00010a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34