Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc98b5b104f45c8…

MALICIOUS

PDF

85.8 KB Created: 2021-03-19 11:12:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c5915cd8eb18caa32f34e553f338ec52 SHA-1: 91702c4d3f70dfe31517dfb16eb482b7997f0edc SHA-256: 6bc98b5b104f45c8dc929a019f7101b48c73abd5dd92726a3dd4ab91f1f35a4e
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 0.9994

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://crophysi.ru/wix?keyword=invicta+pro+diver+0070+manual PDF link annotation
    • http://mozobadijoba.medianewsonline.com/plato_complete_works.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469136/normal_6003c4c8df99b.pdfIn PDF document text
    • https://koloputumoti.weebly.com/uploads/1/3/4/8/134887370/rolazetobe_nanas_rawibaxovo.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/sad_song_we_the_kings_piano_letter_notes.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/guy_debord_society_of_the_spectacle_film.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/22144518072.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/hackers_heroes_of_the_computer_revolution_by_steven_levy.pdfIn PDF document text
    • http://vofigasu.medianewsonline.com/limelujakowifizilojad.pdfIn PDF document text
    • https://pejapuvurexoku.weebly.com/uploads/1/3/1/6/131636728/1398172.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/6d013.pdfIn PDF document text
    • http://rukozhop-guide.com/wezasipeliwikogotd818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423750/normal_6017b58b7332c.pdfIn PDF document text
    • http://geniusenglish.space/spelling_book_4th_gradex3dyj.pdfIn PDF document text
    • https://geridaradekod.weebly.com/uploads/1/3/1/4/131437552/sovomupuwid.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://romofimor.onlinewebshop.net/watajirubu.pdfIn PDF document text
    • http://widepidaba.atwebpages.com/gevitesawumamajilesomikad.pdfIn PDF document text
    • http://pulitisagot.atwebpages.com/austria_student_visa_application_form.pdfIn PDF document text
    • http://tisavan.onlinewebshop.net/81316734594.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/nojafoxikukofivafoxapu.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/how_to_do_apqp.pdfIn PDF document text
    • http://pekiluji.atwebpages.com/bernanos_l_imposture.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011074.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11074 23304 bytes
SHA-256: 84ded29ff15bbfedfebd8ba5578c22b82fa041412c70bf4a191cb8080763ac5c
font_00_sfnt_off0000db0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0D 5140 bytes
SHA-256: f1fae307a4dec23c10a3f2f0f53628593d41572d2b99347fab5dad4ddf7be96f
font_01_sfnt_off0000ec6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6B 10608 bytes
SHA-256: c4c309615af24390fce38563e71c25afeb4e4b4062bff30bfa1bb45daf73f475
font_03_sfnt_off00013979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13979 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.