Malicious PDF — malware analysis report

Static analysis result for SHA-256 69908b1653136399…

MALICIOUS

PDF

72.2 KB Created: 2021-02-21 16:04:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 271dbd60ebcaf3fcae94dde98783d35d SHA-1: 50d125395f7d2cc73519a1dee6688ed4ef9c3fcf SHA-256: 69908b1653136399420ca9467fa0813cce9c2c94731fae9ac0327f4cdc32c116
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/wix?keyword=games+like+battlefield+heroes In PDF document text
    • http://huaweistoreukr.xyz/astm_e2500rbiev.pdfIn PDF document text
    • http://formverifiedbadge.com/present_simple_tense_test_with_answersnmcvk.pdfIn PDF document text
    • http://moreprodukti.com/6389086473700isq.pdfIn PDF document text
    • https://nebenumepidenok.weebly.com/uploads/1/3/5/3/135307723/somidal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455876/normal_600a7a88458c6.pdfIn PDF document text
    • http://kifenefazujiz.iblogger.org/revision_worksheets_english_grammar.pdfIn PDF document text
    • https://felipivi.weebly.com/uploads/1/3/1/8/131856333/5a54299be9163.pdfIn PDF document text
    • http://organicsss.space/html_404_error_page_website_template768v9.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/vovuzize/22994949824.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/vazasamowokop.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/73738607813.pdfIn PDF document text
    • http://pakatikik.epizy.com/47578615745.pdfIn PDF document text
    • http://vodobugatusexa.epizy.com/mopari.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/noveliberapuja.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/ruwawuwonaxilewod.pdfIn PDF document text
    • http://babefuv.epizy.com/73993925625.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/1059011425.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_off0000dd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD93 5384 bytes
SHA-256: ef232b62d4121b7cf54537071ebc67e7500fb6692ee91954abdbc36233378cc0
font_01_sfnt_off0000efb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB5 10576 bytes
SHA-256: 9a0b6abcda3d907bb74e67057f1716f076d7ace04eabdd86b6d65e8ceeeb364a