Malicious PDF — malware analysis report

Static analysis result for SHA-256 116ed76710531a7e…

MALICIOUS

PDF

78.9 KB Created: 2021-03-30 00:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c494e502b517cedb8fad9aecaab93956 SHA-1: c291cd7029a8731175df72d5748b90bae091f4c9 SHA-256: 116ed76710531a7e89785fe95f86ad937e49cdfa7942eb05e3e6d2e902d93180
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 0.9995

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://nipisod.ru/wix?keyword=poweramp+full+apk+free+download PDF link annotation
    • http://teachersaid.fun/hal_leonard_guitar_method_book_2_freel3skh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369786/normal_5ff19d44e2393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368954/normal_602084dfb4948.pdfIn PDF document text
    • http://graatorama.space/easy_worship_motion_backgroundszzkx7.pdfIn PDF document text
    • http://hesap-al-sat.com/baana_kaathadi_tamil_songs_freevm3dp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411228/normal_6054554c11526.pdfIn PDF document text
    • https://jadivamanug.weebly.com/uploads/1/3/4/8/134868371/sujubenagutubawawafu.pdfIn PDF document text
    • http://mscredit.info/5011345494heyt5.pdfIn PDF document text
    • http://urologo.store/22095771493cl3uz.pdfIn PDF document text
    • http://raifaisentgo.online/64460945971oqx38.pdfIn PDF document text
    • http://snapchat-alert.com/jalonojikoxaximilixilinekebs6h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459162/normal_5ff9c13ab725e.pdfIn PDF document text
    • http://azorocheat5.xyz/397_gramos_de_leche_condensada_a_mililitros0iwsm.pdfIn PDF document text
    • http://creamspait.xyz/73319978027a83ud.pdfIn PDF document text
    • https://vinofuloro.weebly.com/uploads/1/3/4/8/134850824/tekopuleniso-zalonisifowaja.pdfIn PDF document text
    • https://monokuzofo.weebly.com/uploads/1/3/2/7/132741222/gobekokokib_zipad.pdfIn PDF document text
    • http://sq11mini.com/python_snake_for_sale_brisbane62wvg.pdfIn PDF document text
    • http://my-favshopf.online/why_is_my_hard_wired_smoke_detector_beeping_ukurk5k.pdfIn PDF document text
    • http://pshcomonhere.xyz/wixosiganowemumovuwudu9jx9o.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://db6d3479-2aeb-4a59-914c-1f55c48648c8.filesusr.com/ugd/9f5433_e33f315b3cca494ebc8f3faefa18a281.pdf?index=trueIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_43fc1e19e15e476785322a32fd8e946b.pdf?index=trueIn PDF document text
    • https://8650d040-a33d-467d-a608-6706f181f11b.filesusr.com/ugd/61b8bf_595a8427ccc3409585ed57180a615838.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9A 4920 bytes
SHA-256: b5ad2b6a977170a4c26fddde2e825eef27a5ef815419faf7a6e3df8362e42563
font_01_sfnt_off0000fe45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE45 9964 bytes
SHA-256: b657e91b7b8c9fcbdcdc9a7c089ef450ab5fb41f99b57778424701205ff6d439
font_02_sfnt_off00012052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12052 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333