Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d645c141e8fe475…

MALICIOUS

PDF

73.2 KB Created: 2021-02-06 04:10:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 8745ebc2d1dcc252c75f41eea97b2a7c SHA-1: a1823c1fd9d388e506495f5c6da09facd6c09988 SHA-256: 7d645c141e8fe47571fa31b2722bd5be1e4395f5a9ae8a54ba519f52ef382b37
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=aztec+clothing+information PDF link annotation
    • http://slmit.fun/skyteam_skymax_125_workshop_manualy9bwd.pdfIn PDF document text
    • http://reduslimitalia-ufficiale.site/gesumimexemakogiwavosuguad1jd.pdfIn PDF document text
    • https://bixugukov.weebly.com/uploads/1/3/2/6/132680808/5088d8f988e.pdfIn PDF document text
    • http://uniques.space/tintin_freeajt0z.pdfIn PDF document text
    • https://wisiwojapano.weebly.com/uploads/1/3/4/8/134896472/349de.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/jSahbha/53204052465.pdfIn PDF document text
    • https://morapunepa.weebly.com/uploads/1/3/1/6/131606469/nagiliwat.pdfIn PDF document text
    • https://cdn.sqhk.co/ninoporaleva/hfidZib/rally_cars_for_sale_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/xagogudexo/BjaLhjy/dsi_2020_recycling_schedule.pdfIn PDF document text
    • http://sebofafekorav.iblogger.org/pawonagowumobuwija.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496204/normal_5fefe13b36b94.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/tikofaketonub/avast_anti_theft_app.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/briar_hill_primary_school_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/tetemaxetavexu.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/jurnal_nyamuk_anopheles.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_off0000dd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD69 5156 bytes
SHA-256: f3b197998dde7750bf678a9f15aa5a98aa0f619a5ab128b3529770fea88713ff
font_01_sfnt_off0000eed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED2 12508 bytes
SHA-256: 5d008b45e7c66164dac1b932c22416cb103667b4e7759aeba712284a6695a5d0

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