Malicious PDF — malware analysis report

Static analysis result for SHA-256 d813bd41982d0d9b…

MALICIOUS

PDF

80.2 KB Created: 2021-03-30 01:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6561cc7a04e1eb5fcb77c14214c98368 SHA-1: 727c7c16fdef1b4707dd8df22fbbca7a027405dc SHA-256: d813bd41982d0d9bd3f7822b2f940c4103452d512228780c9f040542621a0ea4
136 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, with the primary malicious URL being https://ponafet.ru/award?keyword=apc+600va+ups+specifications+pdf. The heuristic 'SE_TRAVEL_SUPPORT_PHONE_SCAM' indicates a high likelihood of this document being used for a scam, potentially by stuffing phone numbers to mislead users. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Travel-support phone-number stuffing scam critical SE_TRAVEL_SUPPORT_PHONE_SCAM
    Document repeats phone numbers in airline/travel/refund/support language, often across multiple regional phrasings. This matches SEO/support-scam PDFs that impersonate airlines or travel brands and route users to attacker-controlled call centers rather than a normal travel document.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/award?keyword=apc+600va+ups+specifications+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459060/normal_604ca2a6b2970.pdfIn PDF document text
    • https://cdn.sqhk.co/dudokirabog/hgghggv/99743136501.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459628/normal_60143c3e56252.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/sh1uic3/nusok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403946/normal_6007ea0e35ef8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481847/normal_6045c1263adbe.pdfIn PDF document text
    • https://cdn.sqhk.co/losomilodip/XifZwcO/40155203042.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_6034dc67ce8cf.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/j7ji2hh/39677053180.pdfIn PDF document text
    • https://cdn.sqhk.co/zimalodepafo/ZZzjiha/xonesabip.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/djioaig/warrior_cats_amino_bio_template.pdfIn PDF document text
    • https://cdn.sqhk.co/fofibexogifu/apjbiic/factual_data_credit_report_login.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000e297.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000e297.bin)
    • http://kujugomanata.rf.gd/25488986130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0dae4c8-19e0-44ce-ac52-ed07bd1d33df/how_long_does_a_milwaukee_m18_5.0_battery_last.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8dac891-8ba7-42e9-b5d5-3979f68ee82f/48402929893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59506178-4dd3-48bd-acbd-d0638855fab0/how_to_create_a_main_idea_statement.pdfIn PDF document text
    • http://vepilezora.epizy.com/mulofolakevimuxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ef65163-f27a-405f-9b6f-48cfb655ba44/kuzev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dccaa88e-45a5-42d2-a1fd-e809bd3893c2/what_does_the_word_b_mean_in_slang.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35184a39-b108-4fb0-9b0d-3f9cc07da0b9/maytag_bravos_washer_repairman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/173e1c75-49a7-48ee-965a-844e96004986/5th_grade_go_math_book.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 extracted file (font_00_sfnt_off0000e297.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off00011c43.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off00011c43.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE297 5364 bytes
SHA-256: 616af8a1a7c401d2df0c5d5094a24be940e550493caad07f1b5757a5effcdfaa
font_01_sfnt_off0000f4f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F6 12028 bytes
SHA-256: 765be63a6da07be15029699f52b1376db040c7549a2b2eab21c74b804672ce08
font_02_sfnt_off00011c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C43 16144 bytes
SHA-256: 764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf