Malicious PDF — malware analysis report

Static analysis result for SHA-256 bace8aea7845689b…

MALICIOUS

PDF

73.7 KB Created: 2021-02-25 00:33:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9c5f2b2907f2d5319cb9ff2801e6a955 SHA-1: 1bed9a28e202f3a92cccb036eba0a868e5555d3e SHA-256: bace8aea7845689bb534571572556b5bafebf1ac81b0d9fd92b2c3a5917bf691
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/aws?utm_term=what+is+an+example+of+a+quantitative+research In PDF document text
    • https://borerejo.weebly.com/uploads/1/3/4/0/134040615/kupipimavijejaxe.pdfIn PDF document text
    • http://levelupguild.com/banofetonubopuol4gv.pdfIn PDF document text
    • http://ogranicbio.fun/bewajunaratumimabusibaxurtf3g.pdfIn PDF document text
    • http://jadivaza.iblogger.org/pukidisoxor.pdfIn PDF document text
    • http://lirubapifegira.22web.org/valupaw.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/lorifumofelu/doctor_appointment_booking_template.pdfIn PDF document text
    • http://porininiji.epizy.com/word_brochure_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/lycoming_io-360-l2a_parts_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/82263239126.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/able_to_extract_professional_free_crack.pdfIn PDF document text
    • http://bimofufikogeti.epizy.com/bogan_songs_free_mp4.pdfIn PDF document text
    • http://zebigibozudival.epizy.com/before_anna_todd_book.pdfIn PDF document text
    • http://puzazodigeza.epizy.com/numoposekijolena.pdfIn PDF document text
    • http://wazuvolixevafo.rf.gd/why_reheating_of_steam_is_used.pdfIn PDF document text
    • http://figapow.epizy.com/28741926563.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_off0000e205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE205 5524 bytes
SHA-256: 9769de178b5cc55dbe6cf25df3f774480e5ef16b97ca32981c9bb0b52bda590d
font_01_sfnt_off0000f4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BF 10964 bytes
SHA-256: 64b80184a78676634d8780dfd25fa08092f79b0aa6870dd20d2a5d93000add89