Malicious PDF — malware analysis report

Static analysis result for SHA-256 731cf103779b2339…

MALICIOUS

PDF

73.2 KB Created: 2021-03-03 19:30:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 2f476ff7f7c2394f829db9f3c999e4f6 SHA-1: 3eab05ca62b222c095fb68a987bcc46c06fa7627 SHA-256: 731cf103779b2339efa06d4a0575a1a9a8f201d7057fa88a0df511c47ba30fca
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=sonoma+county+transit+route+map In PDF document text
    • https://nafogoke.weebly.com/uploads/1/3/4/7/134776139/wufuzutija.pdfIn PDF document text
    • http://mishabelle.ru/30048350890iht43.pdfIn PDF document text
    • http://blaugrana.ru/hill_climb_racing_highway_game_download_for_pcrqw3v.pdfIn PDF document text
    • http://zexupopudoxop.iblogger.org/how_to_choose_a_dehumidifier_for_basement.pdfIn PDF document text
    • https://cdn.sqhk.co/nixibaraje/HahghbR/diversification_involves_more.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499285/normal_60219e70640d1.pdfIn PDF document text
    • https://cdn.sqhk.co/mutuwatu/jhihijV/auralux_2_polarity.pdfIn PDF document text
    • http://zolekumosex.iblogger.org/accident_report_form_18.pdfIn PDF document text
    • http://naturebiolog.space/beats_earphones_owners_manualf90gp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386828/normal_5fddd20ba16a5.pdfIn PDF document text
    • http://oneplusonemain.xyz/tiruwekezesenij3o4ej.pdfIn PDF document text
    • https://fafidapumexeri.weebly.com/uploads/1/3/1/4/131437561/nofolam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415322/normal_6008c0b87e1e8.pdfIn PDF document text
    • https://cdn.sqhk.co/wisulekekij/bVjeha0/full_hd_screen_recorder_for_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/gf4vggm/onedrive_sign_in_error.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490539/normal_60226bf2ddc59.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nupusadulawux.epizy.com/where_is_the_expiration_date_located_on_a_britax_car_seat.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_off0000e2c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C6 5252 bytes
SHA-256: 3c8b6ad51ec02236c89e3e4e3ff3fa4d7f60c81bfbdf0e9af64353305d0815be
font_01_sfnt_off0000f48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48D 10300 bytes
SHA-256: b89eb2c061f424ea0842b6156de06d388ef6bf3c39aaeabf1233bf73c2ca92d3

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