Malicious PDF — malware analysis report

Static analysis result for SHA-256 970005ff420567a8…

MALICIOUS

PDF

78.2 KB Created: 2021-04-29 01:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6425feebaed11e34afbd40fc732e2eee SHA-1: 11016b0ca50c1d900eabadd0c23e51fee6f74a45 SHA-256: 970005ff420567a8b8b927e1bee1148487abf6a92a945bc0d3830c4466d98fe5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=french+number+chart+1-1000 PDF link annotation
    • http://gutagige.sportsontheweb.net/95590394698.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409393/normal_600f02496b085.pdfIn PDF document text
    • http://setokanekema.mygamesonline.org/spelling_activities.pdfIn PDF document text
    • http://saripituxupagek.sportsontheweb.net/butyrospermum_parkii_butter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486054/normal_5fd30c715649c.pdfIn PDF document text
    • http://fosavaxenu.mypressonline.com/homemade_poultice_to_draw_out_infection.pdfIn PDF document text
    • http://gezinuduwep.medianewsonline.com/81728182557.pdfIn PDF document text
    • http://fofolep.mywebcommunity.org/puxone.pdfIn PDF document text
    • http://fosonelotila.medianewsonline.com/37641125858.pdfIn PDF document text
    • http://migunovaj.iblogger.org/ananasi_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452624/normal_605bfad4cba25.pdfIn PDF document text
    • http://kexawez.mygamesonline.org/nios_506_assignment_answer_in_english_download.pdfIn PDF document text
    • http://wativeb.mypressonline.com/77881123135.pdfIn PDF document text
    • http://fetedeju.mygamesonline.org/logitech_bluetooth_keyboard_number_pad_not_working.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471091/normal_601c72c63c4b8.pdfIn PDF document text
    • http://midarujiwuvi.mygamesonline.org/70417263266.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/32c161cd-30a0-4024-9c53-8dfb37bd211e/how_to_login_my_facebook_account_without_email_and_password.pdfIn PDF document text
    • http://kidogip.epizy.com/mumazasijiwafotagefaweli.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/the_miseducation_of_cameron_post_full_movie_free.pdfIn PDF document text
    • http://bumotelaladu.epizy.com/96778610341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4d3f5bc-19c6-4b2a-8811-959b779465b1/is_samsung_series_550_a_smart_tv.pdfIn PDF document text
    • http://bimomog.rf.gd/4326581068.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_off0000efbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBD 5148 bytes
SHA-256: 7d82cd658a49a93a8f0c4de3c3a9d0f5e8089a03f1fe0f44259e3b57b68bc4c7
font_01_sfnt_off00010122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10122 13424 bytes
SHA-256: 2efa3206bb2a449a38e028751e228eb13d74cebcb60c8f3cb506e2ae96c8e0cf

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