Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d2d6a8359982cfe…

MALICIOUS

PDF

59.6 KB Created: 2021-02-22 03:36:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d33c799b3a034a5dc295b97c32185f9f SHA-1: e2cbba23c786d1b78f3be749f0202c830b627b44 SHA-256: 8d2d6a8359982cfe658eb345c0c81fd4631dee48c45c9d7fc9a086a65fbe8472
256 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://nevomunetis.weebly.com/uploads/1/3/0/7/130740414/6239192.pdf.
  • 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.
  • 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/wix?keyword=electrolytic+cell+worksheet+answers PDF link annotation
    • http://robinmani.site/copay_bitcoin_wallet_apkn5ps9.pdfIn PDF document text
    • http://nutapobo.iblogger.org/coldplay_scientist_piano_sheet_free.pdfIn PDF document text
    • https://nevomunetis.weebly.com/uploads/1/3/0/7/130740414/6239192.pdfIn PDF document text
    • http://wonder-ita.fun/viwejenetotijupofikmujy5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruzovufu.epizy.com/camille_lol_guide_top.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/android_7._1_factory_reset_password.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/90628460772.pdfIn PDF document text
    • http://zinizebaki.epizy.com/44275158951.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/christchurch_earthquake_2011_information.pdfIn PDF document text
    • http://piwalalif.rf.gd/20900794913.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/vufevarabozogunarusefore.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/velirojizomafuj.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/powerpoint_2016_custom_template_location.pdfIn PDF document text
    • http://xaposekesudonod.epizy.com/97940910117.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/canada_food_guide_servings_for_seniors.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_off0000ae96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE96 5100 bytes
SHA-256: bf1c3f8e6238094b0a51b0bf83b64cf3159d65bc42b6ed76fe43e147e79876e4
font_01_sfnt_off0000c006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC006 9840 bytes
SHA-256: a0343d8d61b910c23f3435655da86079161f90fb95559371c6581e58a2b0f78f