Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ea2d260a11e3dd…

MALICIOUS

PDF

75.5 KB Created: 2021-03-23 18:04:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 15fc2336694049dac819fd0da6dd19f2 SHA-1: b067194423b2f23d814e71a5dab3950a66de5b47 SHA-256: 17ea2d260a11e3dde29df0472f69f663894176b3e457bad0510190115ce0999b
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 0.9997

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://maypoin.ru/123?utm_term=the+score+atlas+album PDF link annotation
    • https://cdn.sqhk.co/telapunojawu/hIgk3ih/guided_reading_strategies_by_level.pdfIn PDF document text
    • http://muvezada.iblogger.org/bilinear_form_dot_product.pdfIn PDF document text
    • http://sparzha.club/53696809272k1fmq.pdfIn PDF document text
    • http://artrosil.xyz/simple_definition_of_technology0y0qg.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/Rgfhchj/penguin_simulator_apk.pdfIn PDF document text
    • http://gojoges.iblogger.org/kure_beach_pier_fishing_report.pdfIn PDF document text
    • https://cdn.sqhk.co/bagadogod/oChzhav/flat_zombies_defense_cleanup.pdfIn PDF document text
    • http://characduwe.space/145612129756de0z.pdfIn PDF document text
    • http://top-odejda.com/luxomomomuvamizorefb22u.pdfIn PDF document text
    • https://cdn.sqhk.co/fufafetuno/hhcjijq/gutolifowab.pdfIn PDF document text
    • http://revershjtb.site/71054068286v91mg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_106760281e744776b6a0b369701d61ce.pdf?index=trueIn PDF document text
    • http://fukogalijikufoz.epizy.com/kudivudugezumavo.pdfIn PDF document text
    • http://zilekej.epizy.com/audacity_chorus_effect.pdfIn PDF document text
    • http://zotixawip.epizy.com/one_thousand_and_one_nights_film_online_subtitrat.pdfIn PDF document text
    • http://tugitoxo.epizy.com/78632390837.pdfIn PDF document text
    • http://lejugilisotev.rf.gd/holy_bible_telugu.pdfIn PDF document text
    • http://vukekabexipog.rf.gd/jebeb.pdfIn PDF document text
    • http://lobaman.epizy.com/auriculothrapie_formation_toulouse.pdfIn PDF document text
    • http://sububadanevabu.epizy.com/judunemozezur.pdfIn PDF document text
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_86a56832e65c42e2a25ec648381fc2c4.pdf?index=trueIn 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_off0000e9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A9 5128 bytes
SHA-256: f568ba901f0f7bb4b4c55795491a921443cafa53af4e5e5269ea3f76cc6e389a
font_01_sfnt_off0000faee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEE 11288 bytes
SHA-256: 1345eb468abf8f3ba5baa3083e77262cdc6b3adbb59694ee34b24b2ead51256a