Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ffc64f9e3992053…

MALICIOUS

PDF

68.4 KB Created: 2020-11-29 11:42:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: e58e1772799b795f59bfa6b022cf7188 SHA-1: d13a8abbf6a0ee289b3021a6600e40cc0cc990f0 SHA-256: 2ffc64f9e3992053ff968fdbc1ace9406da2de12159c7841ae0ca4b8bef27d79
196 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
  • 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://trafffi.ru/123?utm_term=michigan+state+university+human+anatomy PDF link annotation
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/3138913.pdfIn PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/8817344.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/6327393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5fb61d5b70090.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/2966987.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/fifomi/zesesubikopivaberino.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/anti_ragging_student_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/55735107512.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/lenepetebudepiwizil.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/meters_to_inches_conversion_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/navodaya_vidyalaya_admission_form_download.pdfIn PDF document text
    • https://s3.amazonaws.com/remoxi/how_does_an_electromagnet_work_in_a_speaker.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/beluromabuzovakanejabeli.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/kevobaligupufisapakujiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/67490121897.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_off0000cde1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE1 5348 bytes
SHA-256: bd75516131479c85875a7784698f10b49c41b5d82501170a35f4683f5f3db6b0
font_01_sfnt_off0000e002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE002 10768 bytes
SHA-256: 0caa52931055996668c7b48c493e60d5108ddc5ceb961847306fe85621ba54f0