Malicious PDF — malware analysis report

Static analysis result for SHA-256 0386dad9a5c49c12…

MALICIOUS

PDF

75.7 KB Created: 2021-05-02 12:23:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 42b0f8a496a639356088f7f7b068e271 SHA-1: 451a3158ea0d336e7273a68249bbc3bf09d558ec SHA-256: 0386dad9a5c49c12214e016d18eae1b0a39324b1deb7ab2bb4e47efd1219d97d
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 0.9997

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
  • 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://xezojetit.ru/strik?utm_term=tommy+emmanuel+lewis+and+clark+tab PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4428331/normal_5ff48a5bb6809.pdfIn PDF document text
    • http://fikakutipid.mygamesonline.org/82046250322.pdfIn PDF document text
    • http://sifisomatexow.sportsontheweb.net/cuba_travel_guide_lonely_planet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415304/normal_603c7b9f6f944.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484605/normal_6007d307c5886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388613/normal_603342dbc514b.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/9ca05d77-294b-4adb-b85a-d425d4a14991/what_is_after_new_moon.pdfIn PDF document text
    • http://jimarol.myartsonline.com/alumni_registration_form_for_college.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d359436f-ad55-44ba-a029-5510f1ba5386/how_to_set_krups_coffee_maker_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4f97e93-f077-4a09-9030-69f96de09e73/fojizumurafesutetoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4963379f-1f57-446f-a0bb-9ab20fe341f5/5700474504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f21cbaee-e35f-4c4e-a237-c1c67f4cd3ff/where_to_stay_in_cambodia_angkor_wat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1258156-7313-4620-a40e-12c19891a135/nibokitoxiluzi.pdfIn PDF document text
    • http://luvugotanufulav.epizy.com/mutibutibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/933d4ed2-aef6-4dfe-a900-efc7d8fa2e57/70427909511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c234308-4c2b-4438-b368-736a38c94dbc/navy_and_marine_corps_achievement_medal_with_c_device.pdfIn PDF document text
    • http://gulalebiton.epizy.com/82827877101.pdfIn PDF document text
    • http://jujobope.atwebpages.com/78927147760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf002d1b-e3e2-49e4-9da2-18ebb2ba22c5/6691780396.pdfIn PDF document text
    • http://giduzorim.epizy.com/libro_el_banquete_de_platn.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D2 5432 bytes
SHA-256: 045757da3adc6ec4f6cbe827279af7adcb0e0999bc451e893db1fdc206c75027
font_01_sfnt_off0000e648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE648 11016 bytes
SHA-256: bd94630f2b38f9f7e56d0c40fad4e56158b169eabe5a7c2d4d4210b19973e89e
font_02_sfnt_off00010c1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1F 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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