Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b9968f758fc3b5…

MALICIOUS

PDF

75.9 KB Created: 2021-04-02 19:26:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4c5ab2cfcda8f8c3c077c12dfa920949 SHA-1: b011b1e476df2491a0d3e6246231dd65bae3c67c SHA-256: 64b9968f758fc3b5cad81c4548b0dd3e6d7e33958854ecd087140a616d935375
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 0.9996

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://botokaw.ru/award?keyword=bear+ears+template+pdf PDF link annotation
    • http://tafugegajotu.mygamesonline.org/38479540523.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/tipos_de_archivos_linuxxlhvl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384301/normal_60636c93bc839.pdfIn PDF document text
    • https://neverazu.weebly.com/uploads/1/3/4/9/134901342/wakipenexerubu-kepin.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/the_five_dysfunctions_of_a_team_review.pdfIn PDF document text
    • https://gitexapovaje.weebly.com/uploads/1/3/4/4/134464395/jazepidijuku_wogakeb_busax.pdfIn PDF document text
    • https://lexezidelaxo.weebly.com/uploads/1/3/4/6/134605078/8839d543ed2c09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452852/normal_602690f2714d3.pdfIn PDF document text
    • http://tasiperop.medianewsonline.com/97323347128.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/merigopitewekirumidap2ips.pdfIn PDF document text
    • https://woxigixekamut.weebly.com/uploads/1/3/0/7/130739530/8b877f297cd.pdfIn PDF document text
    • http://fafikup.scienceontheweb.net/autonics_tc4s_manual_espaol.pdfIn PDF document text
    • http://nezowigivomi.scienceontheweb.net/clasificacion_de_los_asientos_contables.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://s3.amazonaws.com/juzinaramip/bebo_alfaaz_video_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15203ac6-32cd-4cf2-ac80-bbb8bcedaf4a/worewawasibarotedixobigos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3ccd364-67a0-480b-93e6-181900f3d691/libro_la_odisea_zig_zag.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/dapedu.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/painting_canvas_shoes_angelus.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/chota_chota_nanayuthu_tajmahal_song_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f8226ae-951b-4532-b3e7-a45b33b03261/plato_euthyphro_apology_crito_audiobook.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD493 4760 bytes
SHA-256: 7dab9c664ddf6c27ab936abde3b5a2f61468fdd3cf97ee4e190e2a4160411fcd
font_01_sfnt_off0000e4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B4 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0000ed42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED42 10788 bytes
SHA-256: 0bde05125eb80059ee4b2cbd3e3574ac967d5e1499acaaa4f8548e928969748a
font_03_sfnt_off000111d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D0 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34