Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9761276c77abd00…

MALICIOUS

PDF

73.0 KB Created: 2021-02-19 03:10:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5607493988fedd5d413483894b9f05eb SHA-1: 48ef9ace1ceaa6bbbe35b1be62a5a3c601a505e4 SHA-256: b9761276c77abd00e0bb08741aeb8176e3902a19294262d4f8f920fa7bac96da
176 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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/123?utm_term=which+instrument+measure+temperature+continuously PDF link annotation
    • http://save50it.pro/bamboo_sheets_bed_bath_and_beyonddogvx.pdfIn PDF document text
    • http://justiciaforjustice.com/51413838170tl4pn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379387/normal_5fdf12377ec7d.pdfIn PDF document text
    • http://ig-supportcenter.xyz/true_love_dating_chat_flirt_and_meetingkdmx8.pdfIn PDF document text
    • http://citimart.online/dwight_eisenhower_quotes_military_industrial_complexmqcc8.pdfIn PDF document text
    • http://airbin.top/3494548529xtgdg.pdfIn PDF document text
    • http://instgrmmverifiedbadge.com/are_power_supply_cords_interchangeablessa5s.pdfIn PDF document text
    • http://ita-women.space/anger_of_stick_5_zombie_gameplayvq1ow.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/napejaxosinages/pojisajudefadidatek.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/42000016059.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/musisebasabuwebasozekewos.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/duxagupezumumotepud.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/buvagekizeganosej.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/stihl_chainsaw_ms271_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/tovawaviriwe.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/a_m_jain_college_application_form_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/how_much_worksheet_esl.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/senujazagejawafemo.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_off0000e19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19E 5288 bytes
SHA-256: 05004535c9fbdec92c87117ac25976b8d6cf1c48aab77b106609662352b5481c
font_01_sfnt_off0000f380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF380 10392 bytes
SHA-256: 1e5d39d00b795dd560ccb8ae700eb91884b05496319f66f491412ffa95ea888b