Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f1b06ca4e3c287…

MALICIOUS

PDF

72.2 KB Created: 2021-02-09 06:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 128f398fba71300405305d1129986ccc SHA-1: 9dda5281f18ef04dbb90d914245c8c4eabb2edb6 SHA-256: 95f1b06ca4e3c2878615a3558c41e4caeaac1bba967e6de952fd7916c14633d3
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://yafferge.ru/aws?utm_term=inductive+logical+thinking+cut-+e+answers In PDF document text
    • https://cdn.sqhk.co/kisesawaropo/Uheijjf/vugabal.pdfIn PDF document text
    • https://vopilejuwe.weebly.com/uploads/1/3/1/4/131407469/wuxotunofad-zuxamujusi-xivubiwe-minokalipika.pdfIn PDF document text
    • https://cdn.sqhk.co/jifedibodo/vlhbjgs/mixawemevipawotavilovik.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/MR04jda/nuts_and_bolts_el_paso_tx.pdfIn PDF document text
    • http://medakijizu.22web.org/gazujudid.pdfIn PDF document text
    • https://fipogelijemebu.weebly.com/uploads/1/3/1/3/131398193/fujuxujibemejenato.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/vasofirida/32048276903.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/direct_speech_and_reported_speech_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/kuzivopakusukivorujofewi.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/buffalo_bills_uniform_schedule_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/export_webarchive_to.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/st_benedicts_college_colchester_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/ibm_aix_java_7_jdk.pdfIn PDF document text
    • http://besipopi.epizy.com/android_wear_iphone_jailbreak.pdfIn PDF document text
    • http://tovujopojat.epizy.com/87386150820.pdfIn PDF document text
    • http://xoxuvenopojox.rf.gd/arduino_bluetooth_android_graph.pdfIn PDF document text
    • http://runesufosufej.rf.gd/jozuxofuxikituboba.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/mobevowusetagodok.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_off0000dcca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCA 5388 bytes
SHA-256: e5c85619981369b9960488afc3d66aada1544175c82f4248b05d5d0758232e57
font_01_sfnt_off0000ef2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2F 10712 bytes
SHA-256: 130ca44a25e27c8de4c1ca3c2a7c52e3425dfba9886976bba63f8318ef03b452

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