Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5707bb3fe2df8c0…

MALICIOUS

PDF

97.0 KB Created: 2021-03-12 07:49:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e9b22d33740153bb67d7663e75ae5fd6 SHA-1: 41f427ddaba750999ff9a1dbd6911690f95ff368 SHA-256: b5707bb3fe2df8c0b6c7973ea940a9656ac846dedadd77a697f12757fccc78bc
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/award?keyword=mcgraw+hill+biology+textbook+9th+grade+pdf PDF link annotation
    • https://cdn.sqhk.co/nogugojuri/aicTrow/name_on_birthday_cake_special_birthday_wishes_edit.pdfIn PDF document text
    • http://bilet-pdd.site/a_simple_favor_trailer_song2sjop.pdfIn PDF document text
    • http://qlemelest.online/what_stocks_to_invest_in_2021_canadafobv0.pdfIn PDF document text
    • http://namsinc.info/871911039877pmgg.pdfIn PDF document text
    • http://zasoremejoka.iblogger.org/zekosamituvosusuxisolu.pdfIn PDF document text
    • https://cdn.sqhk.co/lazaxosu/wzheDVU/funny_captions_for_pics_with_mom.pdfIn PDF document text
    • https://cdn.sqhk.co/tezejikibus/gZheTic/run_rate_synergies.pdfIn PDF document text
    • http://airbin.top/whats_up_danger_spider_man_free_downloadh5hbr.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/Ihdidl5/retusotujeru.pdfIn PDF document text
    • http://artdebug.site/fixanexepifikiwobcfcp.pdfIn PDF document text
    • https://xeraxoxatetubus.weebly.com/uploads/1/3/5/9/135993523/kerivoruniraf.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/ggf1ied/33178540675.pdfIn PDF document text
    • https://cdn.sqhk.co/gagobuniponi/jfiinhf/jungle_boy_strain_weed.pdfIn PDF document text
    • http://fasibada.22web.org/19451783016.pdfIn PDF document text
    • https://gipenozup.weebly.com/uploads/1/3/1/0/131070487/5222789aea9.pdfIn PDF document text
    • https://gadakuvinud.weebly.com/uploads/1/3/1/8/131871823/8096784.pdfIn PDF document text
    • https://bipinudaw.weebly.com/uploads/1/3/4/7/134718108/bc8310fe14.pdfIn PDF document text
    • https://cdn.sqhk.co/tuseliwi/dDhezim/royal_caribbean_cruise_stock_perks.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://niwuzowebod.epizy.com/79143127311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/278190ad-5b3d-4274-9095-a4c6bc76c26f/hands_of_light_barbara_brennan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0030a79-bf0b-4478-be56-7124dbc553e0/nomunovu.pdfIn PDF document text
    • http://zawagebojirowe.rf.gd/baixar_livro_em_raizes_do_brasil.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A8E 5864 bytes
SHA-256: b3672918797af3eee3a1557b8f9960e4dfd8510ea835e5ad9b90f36b1ab3a9fc
font_01_sfnt_off00014ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EA4 11764 bytes
SHA-256: 08d9167368a304513a578e61bf5784adac3170243ad4c01b1fe6aac4dea340d9

Open this report in the interactive analyzer, or submit your own file for analysis.