Malicious PDF — malware analysis report

Static analysis result for SHA-256 f81c7ab97a0f3c94…

MALICIOUS

PDF

64.8 KB Created: 2021-02-28 13:35:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f095798e902938891e7f6f46b8e2d2db SHA-1: 5c728c498efda13e702484c07095528a091fdc25 SHA-256: f81c7ab97a0f3c9433b5aab43a8a1f38454b8d1d36f8a30010f9dee1fe98624e
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://crophysi.ru/award?keyword=baby+bjorn+high+chair+used+for+sale In PDF document text
    • http://galosidijixiwu.mypressonline.com/who_is_the_poorest_person_in_earth.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dopovis.myartsonline.com/wesapudofoban.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/57540427796.pdfIn PDF document text
    • http://rogidisili.rf.gd/sogepaluxolixiwasufa.pdfIn PDF document text
    • http://japinoxizidunub.myartsonline.com/chrome_adobe_flash_2021.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/corrugated_sheet_thickness.pdfIn PDF document text
    • http://jiwepatifon.rf.gd/walden_thoreau_deutsch.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/c_function_reference_pointer.pdfIn PDF document text
    • http://saluwagasa.onlinewebshop.net/consolation_of_philosophy_book_1_summary.pdfIn PDF document text
    • http://jozobudesurarab.onlinewebshop.net/58475893216.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/repewu.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/30959312268.pdfIn PDF document text
    • http://lefivaselefen.rf.gd/satisadagelizidef.pdfIn PDF document text
    • http://weparaxopulo.atwebpages.com/quimica_organica_nomenclatura_ejercicios.pdfIn PDF document text
    • http://vubelifijam.atwebpages.com/25512509129.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_off0000c0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F4 5652 bytes
SHA-256: 78ebd3db2cf7019ec188d18ef5a30826424b002dc4a623283f0641034ee24af3
font_01_sfnt_off0000d434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD434 9944 bytes
SHA-256: 6ed1010bfbc80ffa0cfe1b7de398e634846df1b87e065d81b99c04a53fb32d7b