Malicious PDF — malware analysis report

Static analysis result for SHA-256 1add87694f93e631…

MALICIOUS

PDF

77.6 KB Created: 2021-04-01 14:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 802f7d2ec384b3dd7df6483630432f16 SHA-1: 41380237383363e658db0d4a9c05499a4401cf26 SHA-256: 1add87694f93e631217fe4810d7f1c15362d736070a94d7a366ae9a65551ad47
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 0.9991

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://baarspo.ru/strik?utm_term=ejemplos+de+dialogos+informales+cortos PDF link annotation
    • https://nopubogap.weebly.com/uploads/1/3/4/6/134667077/1304949.pdfIn PDF document text
    • http://kraftmann.su/regofomikufagagakeyag6a.pdfIn PDF document text
    • http://russianstravel.ru/how_long_is_a_court_of_wings_and_ruin0931t.pdfIn PDF document text
    • http://sweetygirl.club/brusters_job_application6d8h4.pdfIn PDF document text
    • https://suwisabinupa.weebly.com/uploads/1/3/5/3/135351097/dofebid.pdfIn PDF document text
    • http://my-favshopf.online/jipotedoxijofafnoyv.pdfIn PDF document text
    • http://baby-slings.ru/how_to_earn_money_online_apps6lvon.pdfIn PDF document text
    • http://chisto-chisto52.ru/the_book_thief_complete_summaryiin5l.pdfIn PDF document text
    • http://romeital.space/el_pobrecito_translation_english4fa78.pdfIn PDF document text
    • http://pushbiz.fun/93812426199n1rjz.pdfIn PDF document text
    • https://magudutetu.weebly.com/uploads/1/3/1/4/131437318/1819325.pdfIn PDF document text
    • https://xironudobavus.weebly.com/uploads/1/3/4/4/134461104/1734406.pdfIn PDF document text
    • http://astropsychology.site/sexujonexabemesavijabm5oc3.pdfIn PDF document text
    • http://ridunculus.com/the_lighthouse_cafe_corte_maderayk5ub.pdfIn PDF document text
    • http://lelonul.iblogger.org/jawad.pdfIn PDF document text
    • https://xirofepomare.weebly.com/uploads/1/3/0/8/130814083/cbeca774c.pdfIn PDF document text
    • http://zalavsky.ru/a_smile_in_the_mind2khjd.pdfIn PDF document text
    • http://wiregabjuk.fun/73474091537bljqc.pdfIn PDF document text
    • http://xtw2.club/wukisukakevustyno7.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/nufidibodudulad/bluedio_f2_user_manual.pdfIn PDF document text
    • http://kanoduluzoxa.epizy.com/bubeje.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/what_does_prevailing_wage_mean_in_california.pdfIn PDF document text
    • http://lawigut.rf.gd/lofus.pdfIn PDF document text
    • http://ruzoguniwu.epizy.com/la_campanella_sheet.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_off0000edad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAD 5508 bytes
SHA-256: a1dd1e34f8ad4b0a6709f92183e16c652bff8d3f4bbb26d3fc70a23da1a286e0
font_01_sfnt_off0001005a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005A 11908 bytes
SHA-256: 3bda340cc7489015c4e1354956b7ac7aca2e9e4ef6e64bf2c77e9787b154f186

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