Malicious PDF — malware analysis report

Static analysis result for SHA-256 e350f3737d496100…

MALICIOUS

PDF

65.4 KB Created: 2021-01-10 11:39:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 13badbd7a86ae490e8b2435e62651485 SHA-1: cf98345e4aede2127024c09372731b965e281db1 SHA-256: e350f3737d496100140de5b67fda7c725837d9ee7343b9f5dbf3c688b2b36e5c
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://traffine.ru/aws?utm_term=modified+bituminous+sheet+waterproofing In PDF document text
    • https://site-1179057.mozfiles.com/files/1179057/vinitaxufubupejafanaboleg.pdfIn PDF document text
    • https://site-1168078.mozfiles.com/files/1168078/dasofopivobovafe.pdfIn PDF document text
    • https://duzareledibasa.weebly.com/uploads/1/3/4/8/134890493/4975995.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/jehhKgf/the_last_man_to_stand_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/sepufaziru/dgjig8I/cartoon_sounds_app_free.pdfIn PDF document text
    • https://xuvetopugoseja.weebly.com/uploads/1/3/4/4/134484667/podexu_nabaf.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/ijdFJgg/tedojolowodi.pdfIn PDF document text
    • https://cdn.sqhk.co/sakiforivona/LG9twgd/como_revisar_mi_saldo_at_t.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/fosalizuzu/22966785543.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/23649879988.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/becoming_nigerian_elnathan_john_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/diccionario_biblico_reina_valera_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/ayushman_card_bihar.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/arbitration_act_2005_malaysia.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/sipaliwigabujininuwix.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_off0000c28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC28C 5660 bytes
SHA-256: dbbaa30fc3e544e2bb5166315d969307b543cba9755f73d435d066ef05ebeba0
font_01_sfnt_off0000d5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BB 10376 bytes
SHA-256: 812ce582a9be5c58b58912b1ced8130f059065c83501aacc58dcdf233dd6bc17

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