Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd50e8ff857b2c8…

MALICIOUS

PDF

69.7 KB Created: 2021-02-23 18:27:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f8b1c3da71641b643865a87f929a7db2 SHA-1: 32f86e2d44bb4a0427c75c991ce382e2dc5fb467 SHA-256: 0bd50e8ff857b2c88a62d726acfd3536dacadd2b7254fc47a85f694c4635bc0d
274 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
  • 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.
  • 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.
  • 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=oceanside+department+of+community+activities In PDF document text
    • https://cdn.sqhk.co/ditutafewaw/gfWl4ja/food_and_beverage_corporate_venture_capital.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/ijiicjw/pufawosazupugugigenesej.pdfIn PDF document text
    • http://pelistens.xyz/black_beauty_book_series7ubiq.pdfIn PDF document text
    • https://cdn.sqhk.co/kagumuzom/TEiiSp9/imagine_learning_student_view.pdfIn PDF document text
    • http://yeswins.space/langston_hughes_salvationvrhln.pdfIn PDF document text
    • http://cupe1.ru/can_i_become_a_game_developer_after_bca60jig.pdfIn PDF document text
    • https://razitesewiwi.weebly.com/uploads/1/3/2/8/132815022/weleza.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/zumomasugipeno/xodenidupamokokaziperunun.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/wosowisiwoxiwato.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/aeronautical_information_manual_aim_3-_2-_4.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/89977000553.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/circle_theorems_gcse_maths_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/ritifapemadopotipebevipuv.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_off0000c35a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC35A 5340 bytes
SHA-256: db8cf0f78390ce6752913b284da19b3b229bb1db148a932fd24cd3c36d97e7d9
font_01_sfnt_off0000d56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56E 11156 bytes
SHA-256: d3716afa0d5b95d2caa9363829ece42c57976f7315696a8047876a0350b23959
font_02_sfnt_off0000fb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176