Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ae9aa98adbca3a…

MALICIOUS

PDF

64.8 KB Created: 2020-12-13 19:36:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d71394f1e0f4c61fd1f300fd8c4e7cf0 SHA-1: d3f02d713f4e2c462fddc65e035ad6cd0d6f715e SHA-256: a6ae9aa98adbca3a32820aaa0d215958cbfdffb988d4c5d9cc0017926bdd62b8
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://trafffe.ru/123?utm_term=hands-on+information+security+lab+manual+4th+edition+pdf+free PDF link annotation
    • https://bugajujifupub.weebly.com/uploads/1/3/4/8/134894919/sonejebizumup.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/subud/anandabazar_patrika_today_news_in_bengali_language_page_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a0865da-039a-4379-b3ef-a4245717a421/jerusalem_new_york_berlin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/594feb59-303b-4483-aef2-8ad26040ad44/43223844353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7635d90e-4685-46e5-a16c-a693c5a0f265/kavugenofuwoxezurofuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48a1ef4d-8df7-410c-a12c-989c6dbeb313/wewed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c10c27e6-fb32-4899-882e-c439e765c0a9/nikipujavepilajez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e153fb40-acab-4e7f-a176-5835e7811793/dbz_dokkan_battle_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f4bd436-12c4-4a86-a6d6-b2c6b1726637/indoor_volleyball_courts_near_me_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1876bccd-c415-4528-a241-3720d3e83c82/wasapijutimujataniji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/338dadef-6333-47aa-bc28-916d5d2273a0/38143493890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8863ddc-6f82-4b76-a1ae-4e6122f2b61c/88323154483.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf6c3ecc-4fb3-4738-ae34-55bb07bafb0e/65005019447.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_off0000b5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5E6 5720 bytes
SHA-256: 29aa7289cb8fb1719e720bdfc1ba07a064f2c31ffed36286ef07b3cc89fe15f5
font_01_sfnt_off0000c935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC935 13944 bytes
SHA-256: 046addc69d2a47c1fa37145537145970aa254f2b3f30d165504e05659bd9c900

Open this report in the interactive analyzer, or submit your own file for analysis.