Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bad44ee97e4cfae…

MALICIOUS

PDF

74.0 KB Created: 2021-01-20 05:03:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 7cd44b5d425c48b9b9a091db521e8f89 SHA-1: 83e99946835d68594d5ee1577dda45d8e03cfda3 SHA-256: 1bad44ee97e4cfaecc4b1defa0ce86788e9cf75d5083bec92c69855feb790975
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://yafferge.ru/shook?utm_term=hexion+plant+locations In PDF document text
    • https://site-1253218.mozfiles.com/files/1253218/implementation_plan_template_for_change_management.pdfIn PDF document text
    • https://kojulijorivo.weebly.com/uploads/1/3/4/3/134329781/tusikuwenojovo_bulowodogima.pdfIn PDF document text
    • https://site-1173632.mozfiles.com/files/1173632/ninulurenawuruxopogofix.pdfIn PDF document text
    • https://nitomono.weebly.com/uploads/1/3/1/4/131454496/5587746.pdfIn PDF document text
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/fedubevoguv.pdfIn PDF document text
    • https://site-1166064.mozfiles.com/files/1166064/45836299831.pdfIn PDF document text
    • https://site-1173528.mozfiles.com/files/1173528/impulse_response_in_simulink.pdfIn PDF document text
    • https://site-1172012.mozfiles.com/files/1172012/bexunawin.pdfIn PDF document text
    • https://site-1173403.mozfiles.com/files/1173403/bupapakevolisofefu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://meduzifovum.epizy.com/favonanimiw.pdfIn PDF document text
    • http://visasefiji.rf.gd/pebuxuti.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/wujivu.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/grand_theft_auto_san_andreas_apk_aptoide.pdfIn PDF document text
    • https://s3.amazonaws.com/gusaledikugumo/72193344027.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/appended_form_definition.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_off0000e4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B9 4860 bytes
SHA-256: b293d9414f140e6748318c3434e44272b8e12665b641bd2a4a3e6339cc79539e
font_01_sfnt_off0000f555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF555 10988 bytes
SHA-256: 93379ffd292bb66206a46bfcdcf9373536951747865722a45034cca628c3a491

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