Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a1c1c9cfce7a9c3…

MALICIOUS

PDF

73.1 KB Created: 2021-02-28 04:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8f3dd582536010464a1bdb0ab7c6f19e SHA-1: 834e3afc37b6e0a683ca464102ab0708b39fc158 SHA-256: 8a1c1c9cfce7a9c3a6b1c12ba0e0f3e652502a671c198b6e7b62c43da44953b1
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/award?keyword=swingline+heavy+duty+stapler+90002+staples PDF link annotation
    • http://prognoz-football.club/practical_neural_network_recipies_in_cr1di7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406463/normal_5fdef7b657945.pdfIn PDF document text
    • http://smm-target.ru/kazuregelovitepajiwif5fab.pdfIn PDF document text
    • https://cdn.sqhk.co/xijisejes/VUjagg8/earthquake_san_diego_map.pdfIn PDF document text
    • http://homiak.fun/fojesizurodupur13vs.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/ahOjbgc/electronic_music_festivals.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/41735233977.pdfIn PDF document text
    • http://wamuwosola.mygamesonline.org/how_to_make_beats_on_logic_pro_x_without_keyboard.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/jelavenijib.pdfIn PDF document text
    • http://leledup.mypressonline.com/what_does_the_term_strength_of_character_mean.pdfIn PDF document text
    • https://vuxabodunufa.weebly.com/uploads/1/3/1/4/131407539/zonix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491168/normal_6013e7c068e77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483836/normal_6031f4fe16d91.pdfIn PDF document text
    • http://useporte.xyz/honda_fit_2007_sport_modexmtq7.pdfIn PDF document text
    • https://pukefigagarit.weebly.com/uploads/1/3/1/4/131406744/78917da.pdfIn PDF document text
    • https://disaximineta.weebly.com/uploads/1/3/4/8/134883765/510922c613f6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379029/normal_60182f157758d.pdfIn PDF document text
    • https://cdn.sqhk.co/nagebagem/eNhgiha/yellow_jacket_wasp_size.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/48391534112.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
    • 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_off0000d202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD202 5780 bytes
SHA-256: 27895a0e03af01c240f4b8ede9838cff2f2628034f12e5ed99f7a72a56cbc0ce
font_01_sfnt_off0000e5b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B0 10376 bytes
SHA-256: 81ec5aac2e7be24f37904e4b60e41860ac90c96a6929a14143ca797b546950f7
font_02_sfnt_off00010936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10936 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e