Malicious PDF — malware analysis report

Static analysis result for SHA-256 795a921dff00d501…

MALICIOUS

PDF

76.5 KB Created: 2021-02-11 16:13:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6c6af7fdde20351c331d296d03c4b954 SHA-1: 6d56a459bc389c1e73c5d5939fa91408128bea6b SHA-256: 795a921dff00d5016923abdf6ffa49e0848e04ef63f1a16676defcd095b953eb
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://druttle.ru/123?utm_term=alarma+astra+777+manual+utilizare PDF link annotation
    • http://nasporte1.fun/20210909000np2ak.pdfIn PDF document text
    • http://wegansit.space/unique_happy_new_year_2020_gif2i8h3.pdfIn PDF document text
    • http://flymoney.net/659880030707k7wj.pdfIn PDF document text
    • http://tublitalia.space/why_does_cat_tail_twitch4tps9.pdfIn PDF document text
    • https://sezulozag.weebly.com/uploads/1/3/0/9/130969806/2501815.pdfIn PDF document text
    • https://zekilunadaxidub.weebly.com/uploads/1/3/4/6/134631079/f39108bcb.pdfIn PDF document text
    • http://rizaloripejo.iblogger.org/sagudezadexoxadi.pdfIn PDF document text
    • http://penodesige.iblogger.org/wevidonetafaxewibel.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/android_material_design_splash_screen_exampleowbbj.pdfIn PDF document text
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/xewuxuzozor.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/tulosa/titapopufefibuviteme.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/27556118589.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/54678641971.pdfIn PDF document text
    • http://bidasumibave.epizy.com/classification_of_antineoplastic_drugs.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/christmas_day_font_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC18 4948 bytes
SHA-256: 381fb311d1c1927dbf29bc2fa0b58a9e2d70b21a1b013fb57cd78b6d3092f732
font_01_sfnt_off0000fce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE2 11924 bytes
SHA-256: 205ac3950436ece8fa2c3172da33a0c8e56c58e60ccd4b76265fffab4aecb4fa