Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a63a1cfb802adeb…

MALICIOUS

PDF

72.6 KB Created: 2021-02-11 14:17:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 898054c87bd441ae45d9aaa28d91c4cb SHA-1: 36f51fd0fd6d2bac7d0078cd0319c28027e7df21 SHA-256: 3a63a1cfb802adeb62a6215ad61964f241c29c62f87a8ea04960eb46358a60af
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jottigo.ru/wix?keyword=wallet+shield+reviews PDF link annotation
    • https://napokepuwaju.weebly.com/uploads/1/3/1/1/131164128/zodezazorula.pdfIn PDF document text
    • https://kuritemu.weebly.com/uploads/1/3/1/3/131383398/444844932019d.pdfIn PDF document text
    • https://vataripisak.weebly.com/uploads/1/3/4/6/134600115/eb57df9c563b12f.pdfIn PDF document text
    • https://tofaxewa.weebly.com/uploads/1/3/4/6/134672655/sikaxuxulizabogado.pdfIn PDF document text
    • https://xotomunekezej.weebly.com/uploads/1/3/1/0/131070571/suganimolisameximuja.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/jfcagja/9870278650.pdfIn PDF document text
    • https://tisivuvuzudopur.weebly.com/uploads/1/3/0/7/130738638/7123330.pdfIn PDF document text
    • https://somirurawepaf.weebly.com/uploads/1/3/1/3/131381963/lasaberezoxezow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/abcd_movie_ringtones_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/dilevofujo.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/aminu_ala_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/15451002007.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F5 4652 bytes
SHA-256: b85f334614187a256a703fb1d32978265cf28e24f634cc045215ec64dc7af9ca
font_01_sfnt_off0000e3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DF 10928 bytes
SHA-256: 11cffc4f5af6544a3ecf437d86df508203d86d6c73b83e518d04205c82983fb6
font_02_sfnt_off000107e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E9 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e