Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1696451c66b9258…

MALICIOUS

PDF

88.9 KB Created: 2020-12-01 12:09:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0e430b8f65a39a12a73ec74493039d94 SHA-1: 5717e48e1d6b6b166b3a74e17f48e6a4aca9c576 SHA-256: f1696451c66b925873a7fa15951cd875c98c087a019098e088a7f6d9d0eb265a
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a pattern of directing users to potentially harmful sites. The ML classifier and ClamAV detection further support the malicious nature of this PDF, suggesting it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://ggtraff.ru/aws?utm_term=laravel+ajax+form+put In PDF document text
    • https://mavibogixuridez.weebly.com/uploads/1/3/4/6/134635512/9984674.pdfIn PDF document text
    • https://posodukur.weebly.com/uploads/1/3/4/3/134347560/nazibibimavixeguf.pdfIn PDF document text
    • https://dibotora.weebly.com/uploads/1/3/4/8/134870334/e1f615e1e.pdfIn PDF document text
    • https://murudogukezopo.weebly.com/uploads/1/3/4/3/134320821/1441634.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7ef34ef-cde9-429d-9c1f-e3f886173d80/vavebawejamebowazujurin.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2b03bbd14ff0dd2a824dd/t/5fc5a3023c02f22b9dcec552/1606787842742/oneplus_dash_charger.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06d09e5c7695ca9994347/t/5fc134af61e25426e163d112/1606497455850/five_nights_at_chuckys_cheese_on_scratch.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e9e3bda9c57a97be47bf/t/5fc28ea8f3de5e49b5b7a3c2/1606586024897/book_jacket_design_ideas.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d9052e537a05ef22535d/t/5fc577a1cb3e0f577109c3b5/1606776738452/home_depot_receipt_code_lookup.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc109232cf09257bd6ccb44/t/5fc22bc53c02f22b9d560580/1606560712723/95128168252.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2d023d1-2e34-4ee2-9d3c-a648262afdb0/jfk_airport_cell_phone_parking_lot_directions.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/nintendont_wii_gamecube_iso.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00c29085bf90c0ef85582/t/5fc45c689ee0f32b87df327b/1606704232648/finding_direct_objects_worksheet_answer_key.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_off0000ec22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC22 16392 bytes
SHA-256: 18b3a943ffd249ba93ae0f8770ed53557203f2d0b5684301c224610473fcb3eb
font_01_sfnt_off00011d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D02 5012 bytes
SHA-256: a7377ac9e092aa19225e753620498c8c66f7c52a0fb40d9ee4c6f5951896645d
font_02_sfnt_off00012e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E10 11988 bytes
SHA-256: 09a72e23fa79027a5a2c29aa7f22f55403a14f94b39a68c1d15f75c5e8c78646

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