Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5bac962c4bb7cf…

MALICIOUS

PDF

70.7 KB Created: 2021-03-02 12:41:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4dbd09b657f853252a56a525ec3fd0ce SHA-1: 4a635ec5a957b6a9ab04fb5490e40e94610a7a86 SHA-256: be5bac962c4bb7cfa40a51f29e5e02b6ec24d22a487d82eff788064fee49fc95
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://xajibur.ru/award?keyword=meade+497+autostar+computer+controller+manual PDF link annotation
    • https://cdn.sqhk.co/wazikunal/geihiaq/fibowasonireze.pdfIn PDF document text
    • https://kaxorude.weebly.com/uploads/1/3/4/0/134095875/3006399.pdfIn PDF document text
    • https://fuzipoxo.weebly.com/uploads/1/3/0/8/130873840/larise_xerutuv_sodudefumu.pdfIn PDF document text
    • https://kaxozugusejerob.weebly.com/uploads/1/3/1/4/131452826/xulowutijezat.pdfIn PDF document text
    • https://metuliwilive.weebly.com/uploads/1/3/4/3/134386481/9357536.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/30884787212.pdfIn PDF document text
    • http://vobipugiwexidu.epizy.com/how_to_keep_a_thin_waist_while_bodybuilding.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/90132656007.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/86336680342.pdfIn PDF document text
    • http://melufisagaw.epizy.com/gupizorifabupiwug.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/nipiv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B9 5380 bytes
SHA-256: 91cee092575d27982a8df27011a5d80c3086b674dcc0a680f34b3c75802eb46c
font_01_sfnt_off0000dbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF8 10512 bytes
SHA-256: be6f1c9c0dc35d4515d7a01c8b6e11ce176460f4ba6bc67d2e739c474b571788
font_02_sfnt_off0000ffdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f