Malicious PDF — malware analysis report

Static analysis result for SHA-256 74a12ce18d35f28a…

MALICIOUS

PDF

80.2 KB Created: 2021-03-13 21:23:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e3d9f847e4af7a8ddd448a72954cd1d6 SHA-1: 9f5ba5bb0398ed0f982af25a543f5a8cd1e0230c SHA-256: 74a12ce18d35f28a3f495617d230ca5ee1b603cdb1bca87b3c4a87d42b1ade27
156 Risk Score

Malware Insights

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

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 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xajibur.ru/wix?keyword=how+to+find+total+expenses PDF link annotation
    • https://velelamoju.weebly.com/uploads/1/3/1/4/131438442/fujugupajoto_karedar.pdfIn PDF document text
    • http://stroiline74.ru/sanogadixiwusixezakigqjuw.pdfIn PDF document text
    • http://importants.space/78920305059fz6ew.pdfIn PDF document text
    • http://3gusevshop.space/jawofasokrzyju.pdfIn PDF document text
    • http://gajonedorebuko.mywebcommunity.org/income_tax_amendments_for_ay_2020_20_icai.pdfIn PDF document text
    • http://remontnatali.ru/foporuxofijikigepaxatema53udo.pdfIn PDF document text
    • http://aduo5.online/shri_guru_granth_sahib_file_downloada216x.pdfIn PDF document text
    • http://italywom.space/xipenareluvo121ns.pdfIn PDF document text
    • http://nextauto02.ru/swf_6_head_embroidery_machine_for_salel4itr.pdfIn PDF document text
    • https://bizitaninajoki.weebly.com/uploads/1/3/5/3/135316521/rigabo-zuwos-xoxarow-pekifiwodu.pdfIn PDF document text
    • http://goodsfor.life/828977238919k0g5.pdfIn PDF document text
    • http://bukobaxaz.getenjoyment.net/baleduzotoxegevel.pdfIn PDF document text
    • http://app-3null.com/how_to_use_a_sandisk_clip_sport_mp3_playeraz8m2.pdfIn PDF document text
    • https://wadabugijiri.weebly.com/uploads/1/3/0/8/130873870/dopikolewolaj.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
    • https://s3.amazonaws.com/votawawo/what_can_i_do_with_a_business_management_and_marketing_degree.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/guardians_of_the_galaxy_soundtrack_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/what_goes_good_with_white_sauce_pizza.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/rosarewuzijadafina.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/what_was_not_a_component_of_the_french_estates_general.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/47693169475.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/sir_gawain_and_the_green_knight_short_summary.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC4 4848 bytes
SHA-256: 0f65a99e8bab43f9512c18854bd56df0d581e4bb427d149907e849e8d9905920
font_01_sfnt_off00010064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10064 10912 bytes
SHA-256: 7d5a7fcd9a2051ddf2f4272365bfbd8f3ae4d1537fac291bb4b8244771f85948
font_02_sfnt_off00012598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12598 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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