Malicious PDF — malware analysis report

Static analysis result for SHA-256 20dba25378569d83…

MALICIOUS

PDF

82.0 KB Created: 2020-12-04 12:43:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1fdb38fbda78d6f75f80c1c0a142119f SHA-1: e4816ee4440898a1ec8d5434f1af9237cf6070e3 SHA-256: 20dba25378569d839770a1d28c4c3454aba0b33e2e5a83d13c04aacbda7a9f95
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffine.ru/aws?utm_term=college+board+sat+book+free PDF link annotation
    • https://godowipi.weebly.com/uploads/1/3/4/5/134520373/ba8d95.pdfIn PDF document text
    • https://winimotewo.weebly.com/uploads/1/3/4/5/134593518/f777048b3b.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/fofopirem-lisotu-zibumap-fulufi.pdfIn PDF document text
    • https://zokevuwokonumez.weebly.com/uploads/1/3/4/6/134682223/2452426.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc519b12bbd74065821ad2f/t/5fc9a6caacaba317345a89e2/1607050955269/sogesasukov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e9832c0-b577-4a96-876a-904df9ea91b6/20258378372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25e8df99-f156-400b-8ae6-c71a84be81a6/the_dented_helmet_boba_fett_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2fb4b66-bea9-426b-aea9-a019815b26fa/tupiketelasaxelavufap.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc786a281fec0096842acc0/t/5fc84dd2bbb7f45a9285e057/1606962642609/5205931069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beefede8-c27f-4f2c-83e4-8f884667e472/1733111196.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e99a0a2757459be2ef6a/t/5fc361e33485235c86323fd2/1606640103071/92305062432.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc013b624b06a7eb3fa8a9b/t/5fc2ed5a3f75b166433510b0/1606610266533/51006650143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d36260c-3293-43e2-be5b-0b629a8ec32c/katawa_shoujo_different_routes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b52c2050-a5e1-4a08-8587-e061a08c2da2/15852774289.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_off00010657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10657 5184 bytes
SHA-256: 460f58f6ad74e3919155cd52836c99a40c9e7dcd7be2c029281fafa9ca83a7c5
font_01_sfnt_off00011802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11802 10380 bytes
SHA-256: 99d41f49eee919bc22879f8d7031b76abc2b9a63086941150fb2967fae5de1dc

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