Malicious PDF — malware analysis report

Static analysis result for SHA-256 317fd7a73caaeafa…

MALICIOUS

PDF

71.8 KB Created: 2021-02-25 01:28:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: bf6bdc80eead03219bcd91ca8680112e SHA-1: 4e1602d66c153e6b8ede7c9d1ddfd6d040f58e66 SHA-256: 317fd7a73caaeafa526ecf594db56302558d561e1f6267318abe139c18f552b1
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/award?keyword=new+yorker+radio+hour+today In PDF document text
    • https://masevaru.weebly.com/uploads/1/3/5/3/135346062/vupotuvemagimid.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/element_elefw504a_tv_stand.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387699/normal_60265252287dd.pdfIn PDF document text
    • http://kivumokaf.22web.org/249799508.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385612/normal_6035a8238b745.pdfIn PDF document text
    • https://golotarati.weebly.com/uploads/1/3/1/8/131856611/5437925.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/ponivotigegepub/37858295478.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/kaththi_bgm_free_zedge.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/35448616907.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/string._format_lua_return.pdfIn PDF document text
    • http://ralirajuz.atwebpages.com/free_bitcoin_money_adder_activation_code.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/27052659915.pdfIn PDF document text
    • http://kepofif.onlinewebshop.net/ejemplo_de_un_guion_teatral_muy_corto_para_nios.pdfIn PDF document text
    • http://pisatetakedabak.epizy.com/66533383779.pdfIn PDF document text
    • http://relakog.epizy.com/baruch_haba_b_shem_adonai_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/bepuwisatepujeditusozekom.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/87263177975.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_off0000dd0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0F 4928 bytes
SHA-256: e4e8060129f8e131722f607f816435e170d917352da778012ebb737014554d8e
font_01_sfnt_off0000edeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEB 10656 bytes
SHA-256: f81e525b79aacab43463fae5a7c481073fc570d1b6341e1ec835e20d800aa8de

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