Malicious PDF — malware analysis report

Static analysis result for SHA-256 c463e74aad06cfa4…

MALICIOUS

PDF

73.4 KB Created: 2021-02-23 18:55:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 73d16c14c0710b035e48ad4e13bd792f SHA-1: 3f0775df6799da00b267bf3c7c44dfb701eef1e7 SHA-256: c463e74aad06cfa44ad5d9ee1d6eaed52a1374069c2aca97f99a3e22575535f4
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=old%20craftsman%20scroll%20saw PDF link annotation
    • https://ziliseze.weebly.com/uploads/1/3/4/8/134855349/8d7a888c4903.pdfIn PDF document text
    • https://dosevabif.weebly.com/uploads/1/3/1/6/131637409/woxomafusefusurur.pdfIn PDF document text
    • http://varuvoruva.iblogger.org/vokijedat.pdfIn PDF document text
    • https://lexugorubu.weebly.com/uploads/1/3/0/7/130776619/tizurileti-benasikepinive.pdfIn PDF document text
    • https://cdn.sqhk.co/xadakede/ghjB585/pixel_battle_royale_download_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/hhgjHGM/65977187622.pdfIn PDF document text
    • https://cdn.sqhk.co/moturalogupe/drgicTY/space_warriors_2013_film.pdfIn PDF document text
    • http://jifoxife.66ghz.com/swot_analysis_written_report_example.pdfIn PDF document text
    • http://zobebukore.22web.org/10777291652.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/mutirexa/godimutizil.pdfIn PDF document text
    • http://setuvufijub.epizy.com/abbyy_transformer_2._0_serial_number.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/aqeedah_wasitiyyah_english.pdfIn PDF document text
    • http://mibobugaf.rf.gd/hybris_cms_template.pdfIn PDF document text
    • http://zaramapowo.rf.gd/41300011376.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/performance_appraisal_examples_leadership.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/55245162329.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/56352269916.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/91772755884.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_off0000df07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF07 5284 bytes
SHA-256: a1bbb9d8160f696234bf567d323a190afc31f0fd87736f7485d91ef668204af0
font_01_sfnt_off0000f0f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F8 11592 bytes
SHA-256: 08f952317e1b57ec4768870f92a8c3cd83ca3cde62e32873781bd6cbe5f5c8c3