Malicious PDF — malware analysis report

Static analysis result for SHA-256 897d07a0741b50f0…

MALICIOUS

PDF

85.9 KB Created: 2021-06-15 11:12:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dbea9904da6f712ac423a4f93e7926f9 SHA-1: ee86c9817da4c236dcb0acda7d4e63087073f0a4 SHA-256: 897d07a0741b50f0b82a57c8430be37d908b35e0fa97a54b98fa4280533dd5f8
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 0.9983

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://archism.ru/pbw?utm_term=tom+and+jerry+film+1992 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445324/normal_5fe2b624e757e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417652/normal_602a8a2895343.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491432/normal_5fcedcd595f86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389603/normal_5fde1344eac7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490371/normal_5fe0540e4cf6d.pdfIn PDF document text
    • https://dojeviwenos.weebly.com/uploads/1/3/4/4/134491393/zewotukigoromuzeni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468572/normal_5fe370c29f0e6.pdfIn PDF document text
    • https://mixabukosi.weebly.com/uploads/1/3/4/4/134479433/sibunege_nuwonimil_xapesuvituraju_vigizapixog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387929/normal_602b5d4f1d842.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472775/normal_5fef347a266c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413967/normal_6032f0d0b0c5c.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/23042f4a-70b4-4806-8464-c70475c593be/59196145630.pdfIn PDF document text
    • http://kibarilotog.pbworks.com/w/file/fetch/145135026/pokemon_go_attack_speed_chart.pdfIn PDF document text
    • http://nowefuro.pbworks.com/w/file/fetch/145204863/jubejavel.pdfIn PDF document text
    • http://vikuzafofuko.pbworks.com/w/file/fetch/145212084/kexexepasesanawokovunopob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9fec26a-f416-469c-bb5a-7fa3e31213ae/sebug.pdfIn PDF document text
    • http://goxeguj.pbworks.com/f/list_of_paladin_spells.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60f5a4c4-cf55-4091-ad9a-c2a895a265ea/fallout_4_dlc_load_order.pdfIn PDF document text
    • http://gabumur.pbworks.com/f/download_theri_tamil_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c4d78ad-8846-4221-b8c3-7e912f31dcd3/how_can_a_receptionist_answer_the_phone.pdfIn PDF document text
    • http://jijagenaneke.pbworks.com/w/file/fetch/144841704/job_safety_analysis_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc4834f9-e6ed-46ab-aaef-16cba6b4e5a1/kenmore_coldspot_106_fridge_not_cold.pdfIn PDF document text
    • http://zewalar.pbworks.com/w/file/fetch/144465342/yeh_dillagi_full_movie_online_free_watch.pdfIn PDF document text
    • http://fuzobonesujo.pbworks.com/w/file/fetch/144564921/mafeguxofanazofupun.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F3 4844 bytes
SHA-256: 3683209cba48af037b7c19b11e1e235b7b9fdcd1003eba3fe18ece3a97d9f3b2
font_01_sfnt_off0000f8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AE 5340 bytes
SHA-256: 44c17ab9a822c0e576ef63fb64091c7419aa064e95566bc828966a0c0113ef24
font_02_sfnt_off00010ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADA 13212 bytes
SHA-256: a8059912e10bb9c83ad277633e2a22718322dfb8e3ebf9c71ecd280baba7e4e1
font_03_sfnt_off0001348c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1348C 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848