Malicious PDF — malware analysis report

Static analysis result for SHA-256 40ad5aca8dbbb2f2…

MALICIOUS

PDF

68.2 KB Created: 2021-02-25 22:48:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4cec0034738b369d0565f42abb9f53a5 SHA-1: 0201c90e484ad0180552c7f5e7fda892c6eabff9 SHA-256: 40ad5aca8dbbb2f202fbb9e4c5aab2a67f2245eea872deb389dff4d5c802c10d
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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://baarspo.ru/wix?keyword=char+griller+3001+cover PDF link annotation
    • http://kungfumalibu.com/2419081672kkljg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493578/normal_5ff16fef6b389.pdfIn PDF document text
    • http://tizezs.xyz/25708958766ve0c5.pdfIn PDF document text
    • http://tohld.in/47884936049kowle.pdfIn PDF document text
    • http://sellamorem.com/radio_button_form_submit_javascript8gmrs.pdfIn PDF document text
    • https://gitujibexilen.weebly.com/uploads/1/3/1/4/131406430/7655743.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/bejokazemur/movafazaguretinemodejojar.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/94024992476.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/nutrition_facts_dunkin_donuts_iced_latte.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/messenger_lite_latest_update_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/rotary_engine_performance_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/reported_speech_perfect_english_grammar.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/vetawafix.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/wipogefatabo.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/55576473488.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/python_data_science_essentials_review.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/prince_george_county_md_police_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/karnataka_caste_list_in_kannada.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_off0000cded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDED 5204 bytes
SHA-256: d01cd3a55f6c3d52d49d9cbe1b6be5c1f114091f648448a7f4618afd4b77094b
font_01_sfnt_off0000dfaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAA 10504 bytes
SHA-256: 75b932b8f8eb8cf584940f0b8f495d3294bf1641948cf4e5ff69dbce661f9d96