Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4bd1787c7f53602…

MALICIOUS

PDF

97.4 KB Created: 2021-03-18 04:45:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: dfe02c52cb09138cf151a8b0389bca99 SHA-1: cd606ef2308ba00e5129093114213cf56f6240e8 SHA-256: c4bd1787c7f536024f865921047cc354d2600ed6bebc5a9ef7fe80fc17e9b835
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/wix?keyword=wheels+of+life+anodea+judith+free+pdf+download PDF link annotation
    • http://jobediniberine.scienceontheweb.net/how_to_change_liftmaster_wifi.pdfIn PDF document text
    • http://pivolirarorip.mypressonline.com/how_many_tournaments_on_the_european_tour.pdfIn PDF document text
    • http://dororuminaxa.mywebcommunity.org/xobagepemine.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/is_stranger_thing_based_on_a_book.pdfIn PDF document text
    • http://poboxabirukus.iblogger.org/kitizakozenera.pdfIn PDF document text
    • http://ketaton.mywebcommunity.org/sexafagesinijawaribuf.pdfIn PDF document text
    • http://texoraw.sportsontheweb.net/fexiwozazadeparageba.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/zudebonizupo.pdfIn PDF document text
    • http://murimubijejaba.mygamesonline.org/bemomelosajiwoxugoneb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/defujo/peraruzakawujevugele.pdfIn PDF document text
    • http://pujumek.myartsonline.com/zebifubowunedotetokejax.pdfIn PDF document text
    • http://gonegexunu.myartsonline.com/wopabopilibudolitolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ad95876-9998-4c11-8ad5-ca64c4effe83/what_kind_of_oil_goes_in_a_honda_power_washer.pdfIn PDF document text
    • http://suvapik.epizy.com/white_fang_movie_2018_rotten_tomatoes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e60ba20-e310-47fb-b83c-126ed00929c0/50057532959.pdfIn PDF document text
    • http://pibixokemur.rf.gd/product_rule_derivative_worksheet_with_answers.pdfIn PDF document text
    • http://gagutaxu.rf.gd/timex_ironman_triathlon_interval_timer_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b06db7ab-19ea-4c49-89b5-1fd40a210997/im_a_child_of_god_yes_i_am_song_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/sheet_music_for_beginners_piano_free_printable.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EF6 5312 bytes
SHA-256: 9355b3bf04be7c61c46d3833844c61eba5df6b92d69e0c2ee3f8ab39538b1589
font_01_sfnt_off0001511c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1511C 11416 bytes
SHA-256: 019d9f9b0cb12881e186bd701a028fd18368594d835af26f850b0a3ebe533b83

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