Malicious PDF — malware analysis report

Static analysis result for SHA-256 9522af9d71472755…

MALICIOUS

PDF

81.5 KB Created: 2021-03-28 12:35:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: adc2846387daeeea103d2df9f175f1f3 SHA-1: 95c9a6071732731b3008dbe1d0988dc629940803 SHA-256: 9522af9d7147275524db02440b59159c251952af51b9323a6ab8f5b74cfe8555
126 Risk Score

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 0.9993

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://seumenha.ru/award?keyword=ahsoka+tano+book+pdf+free+download PDF link annotation
    • http://moreprodukti.com/running_a_dd_campaign_onlinejjcre.pdfIn PDF document text
    • http://emmetrix.net/how_to_make_faceless_pictures_on_procreatetfwfa.pdfIn PDF document text
    • http://iuts.space/zoxuluzupefugisuzuforanazdqq8d.pdfIn PDF document text
    • http://naturwow.space/kaboxapudigapu4a7u2.pdfIn PDF document text
    • http://itsnat.space/borges_y_yo_jorge_luis_borges_resumengnqq1.pdfIn PDF document text
    • http://jopkapopka.online/kajupogeg45ebz.pdfIn PDF document text
    • http://goodsfor.life/dls_2020_mod_barcelona56g9w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6dd05bf8-a32e-4ce7-8057-9a1894012cff.filesusr.com/ugd/4ce960_b1ee2fd588aa4b92a4470453089bd6fb.pdf?index=trueIn PDF document text
    • https://7b9449e5-51e9-4a7e-81f5-8587c42320f9.filesusr.com/ugd/571bad_f3421e49b76a4a8488a6e30ced119049.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/faf9e7e7-260e-429f-94cf-0c027a00a568/46407748174.pdfIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_ca89244ca40b4e0dbe06efa5883dd912.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jobavo/76436124781.pdfIn PDF document text
    • https://e25b7b56-d8f7-44cb-9276-56428e53d1cc.filesusr.com/ugd/63f3e8_9bf474bafef044c08f0fa2b9d1e39216.pdf?index=trueIn PDF document text
    • http://zelupuvafi.epizy.com/76430432686.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/59643345195.pdfIn PDF document text
    • http://fugewad.rf.gd/94230460173.pdfIn PDF document text
    • https://83d7d1d1-3661-4158-a2cc-78aa4aa39d08.filesusr.com/ugd/163759_98daf75576d945b89a66fce37d6bb8f6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/870e1ef0-28d4-401e-8981-00285ee3d0ec/oster_blender_pro_1200_with_glass_jar_24-ounce_smoothie_cup.pdfIn PDF document text
    • http://lezapogitoda.rf.gd/ldap_commands_in_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/bluestork_template_joomla_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6317f2aa-d94a-4c54-b53f-2e08875cf7e2/mutepamisonefazala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4909997-e66b-40f2-8148-f09a2bb8e2e8/what_is_the_meaning_of_4kt.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/51490046453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0744a5f9-a084-4081-95e8-dc61be8f7e55/what_games_are_good_for_zoom.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA7 5412 bytes
SHA-256: a80311c18b0b35fa5634a2def15387ae862441e6221cf976c2a8f3af5756b812
font_01_sfnt_off00011212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11212 11628 bytes
SHA-256: a89c06a854e645741a8f36286c511e854ea514905e2714c6510045a6337af37f