Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d3963fa03788861…

MALICIOUS

PDF

66.7 KB Created: 2020-12-27 04:01:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4efbf16be0ca7eb76e0c4a121356269e SHA-1: 8b696413271ce436e47dc146ac0bd5f328228366 SHA-256: 1d3963fa0378886175899f25e80f501217317a8191ddd93139465dfccaafaae9
164 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/aws?utm_term=all+pure+apk PDF link annotation
    • https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/87c2338a4f.pdfIn PDF document text
    • https://minufufigazibur.weebly.com/uploads/1/3/4/5/134528603/3619759.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/606d3a6f-234a-4282-83fd-f19f9ab124a4/91217948498.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67a37ce4-abda-43b5-a87b-2ca8ecfdfef7/59237690604.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/dynamic_stretching_for_soccer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7423c3eb-5201-44c5-95fc-d4bc9db2cc4e/55911808099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eadd36a9-62ee-4f7f-9b9c-bc553cef1285/78345866439.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/aldrich_library_of_ft-_ir_spectra.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/blue_ridge_parkway_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ec45400-c068-40d3-81a0-ba2555b492db/jowofibifevegoxadexixu.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/fitezajinakasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9456026-8dea-4a08-b2d7-160bbda3bda4/barbie_fashion_show_song.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/14422389560.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/13185095994.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8EE 4688 bytes
SHA-256: 47a9b8e614e3c406a0022b6c0a04b953abd2667bd78e3e4c70d0779c4606a09e
font_01_sfnt_off0000d8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EC 10716 bytes
SHA-256: 3f0a559392d5b465bc54943a4cca8c6ffa97c8e9448c501bddeddb2340fa9433

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