Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc35f85c16c79903…

MALICIOUS

PDF

78.0 KB Created: 2021-03-24 05:36:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 032551f7173c165a50bc478da20079a3 SHA-1: b36b7827eda9c856ed19350a244a8442a437ab5d SHA-256: dc35f85c16c799032ba39d63dd759c10f835d0e41b2164c49f2fe1a10ea4bdae
74 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based lure. 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 0.9992

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ponafet.ru/123?utm_term=instagram+story+templates PDF link annotation
    • https://cdn.sqhk.co/minofavazu/idihITV/ice_cream_maker_cuisinart_amazon.pdfIn PDF document text
    • https://wonidajubiput.weebly.com/uploads/1/3/4/0/134017859/cb8a073a9c80.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/gXha2jb/bike_racing_game_free_download_for_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/ratufewebu/dihWibm/zig_zag_cactus.pdfIn PDF document text
    • https://mufikufit.weebly.com/uploads/1/3/4/7/134766202/f495a0c80da4.pdfIn PDF document text
    • http://rivalo130.com/bukugamrlen.pdfIn PDF document text
    • http://leledup.mypressonline.com/graphic_design_programs_for_chromebook.pdfIn PDF document text
    • http://dajexori.mypressonline.com/taluredawi.pdfIn PDF document text
    • https://fatitabo.weebly.com/uploads/1/3/4/7/134757356/wopibexubasolibi.pdfIn PDF document text
    • http://sodaapp.pro/black_sabbath_changes_piano_sheet_music_freege71z.pdfIn PDF document text
    • http://lazakefezives.mygamesonline.org/66149452799.pdfIn PDF document text
    • http://pawomodom.medianewsonline.com/my_kelly_services_employee_login.pdfIn PDF document text
    • https://tabugutiku.weebly.com/uploads/1/3/2/6/132682541/717e7891.pdfIn PDF document text
    • http://gagapazu.scienceontheweb.net/nufaza.pdfIn PDF document text
    • https://cdn.sqhk.co/bivadudit/uggBghV/dove_channel_app.pdfIn PDF document text
    • http://boraguw.medianewsonline.com/46789750212.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/wolawatin/suxemudiwu.pdfIn PDF document text
    • http://kufekisawisewo.onlinewebshop.net/23588877236.pdfIn PDF document text
    • http://fusozevukatamir.atwebpages.com/dalakujotovodefibome.pdfIn PDF document text
    • http://wokarodefi.onlinewebshop.net/moxorenitefaxixon.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/understanding_medical_physiology_a_textbook_for_medical_students.pdfIn PDF document text
    • http://sazurufupamaxa.myartsonline.com/vojelazexokirafudubija.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/wogazejabu.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_off0000e5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BA 4916 bytes
SHA-256: 0aedb0bab39025e000da522c18b79e862a857b46f0509c68f12f594fee4a596e
font_01_sfnt_off0000f652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF652 10760 bytes
SHA-256: e9e3dc08770d42e7da209c8fbda264af5b00323d0df589c4dcd68fde06ceb538
font_02_sfnt_off00011b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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