Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b832a5eccda79c…

MALICIOUS

PDF

72.5 KB Created: 2021-03-02 08:17:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 25ce29adaf54b1958542c0a349b35f69 SHA-1: cd4c983b1ab8840c891c4fc828fb8eef9bb63ef7 SHA-256: c6b832a5eccda79c502f1128749e9b2328edab99aa21d0dd6c560440732861a1
254 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
  • 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/wix?keyword=creature+collection+revised+pdf In PDF document text
    • https://kesegupopu.weebly.com/uploads/1/3/4/1/134131766/lefejaveterite_pujilebopetatof_betoki.pdfIn PDF document text
    • https://zenanewexakidop.weebly.com/uploads/1/3/5/3/135310893/rulutanu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384831/normal_5fe3e0a28e3d4.pdfIn PDF document text
    • https://mopuxemunokele.weebly.com/uploads/1/3/5/3/135318458/b39ce9.pdfIn PDF document text
    • http://gaydating.world/lost_boy_piano_chords_sheet_music_freek3u9c.pdfIn PDF document text
    • http://uniques.space/tintin_freeajt0z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493578/normal_6008d25f49666.pdfIn PDF document text
    • http://furniture21.online/dunagukupebevutuzx4q.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
    • http://todojenosefotaz.epizy.com/agenda_2063_de_l_union_africaine.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/59122463043.pdfIn PDF document text
    • http://zotomogizolelaz.rf.gd/88431912264.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/monthly_budget_worksheet_template_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/91879876255.pdfIn PDF document text
    • http://xegikaxobowo.epizy.com/why_is_my_modem_light_red.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/mic_amplifier_software_for_pc_free.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_off0000d267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD267 5116 bytes
SHA-256: bf710cc3394305aa9f1fe083f4194bb56986da987d940fa8d4cc1d960b9ab426
font_01_sfnt_off0000e3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DE 10208 bytes
SHA-256: 14ccd6c4554692e977a48480b2b3371ac55d4e4f0659c055878b22fc26c471db
font_02_sfnt_off000106c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C2 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176