Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf8f022976dea878…

MALICIOUS

PDF

90.7 KB Created: 2021-04-04 06:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 961a5d84c1d292d8d9a8979b4c7d1f5e SHA-1: bda129b0761c162b0c344c0332f12237eb3a76a5 SHA-256: cf8f022976dea878c02957190537d89fe1f67b197782ee15ad11d83e469a3295
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9992

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://crophysi.ru/wix?keyword=defense+contractors+audit+manual PDF link annotation
    • http://probmake12.xyz/budget_speech_2018_south_africayngqg.pdfIn PDF document text
    • http://0fruit.space/26788486397jf3jw.pdfIn PDF document text
    • http://kofoxulemaxabur.22web.org/what_is_closed_cycle_gas_turbine.pdfIn PDF document text
    • http://prechambre.xyz/zosifotujulufosetafavij6befs.pdfIn PDF document text
    • http://legendnat.space/musica_gratis_para_celular_androidho9mu.pdfIn PDF document text
    • http://com-connexion.xyz/zavilukibutisugowiysb1l.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/glkiijh/37947139217.pdfIn PDF document text
    • http://gezuvimazog.22web.org/beropi.pdfIn PDF document text
    • http://buzobofojixez.iblogger.org/68600707938.pdfIn PDF document text
    • http://gogogoinst.xyz/70242767677l4jsg.pdfIn PDF document text
    • https://cdn.sqhk.co/zumedizojas/gTohejg/true_skate_glitches_underpass.pdfIn PDF document text
    • http://bit7.top/guzollm35m.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxiwimemo/Vgihxsu/playstation_network_login_issues.pdfIn PDF document text
    • http://tixshopclub.fun/how_to_cite_pentagon_papers_chicago_stylekntcf.pdfIn PDF document text
    • http://rentline.pro/new_market_wizardsaouob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab38c5f-c808-4848-b018-bd1f6dec5acb/20742452728.pdfIn PDF document text
    • http://mosibetava.epizy.com/falipaxivavo.pdfIn PDF document text
    • http://gofosuxubajo.epizy.com/free_email_signature_template_for_gmail.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/259dabe5-8755-4441-8170-484865fa4884/38642200177.pdfIn PDF document text
    • http://webekilijonelew.epizy.com/call_of_duty_free_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcb869be-40e8-4a88-a864-9541828503d2/8011844652.pdfIn PDF document text
    • http://rotitow.rf.gd/cabala_do_dinheiro_gratis.pdfIn PDF document text
    • http://sawuliwinupunud.epizy.com/subtracting_fractions_worksheets.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_off0001246c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246C 5168 bytes
SHA-256: 4bdca0c5d819ed22902a2c397ad607f5dc8976f6a278f04618282c555692f134
font_01_sfnt_off000135f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135F4 11440 bytes
SHA-256: ffe658b5fc2947ec391f08c5c7dc2efc5c6ecad62acc8c2fb04d210833b24d3a

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