Malicious PDF — malware analysis report

Static analysis result for SHA-256 d410e845c46a17f1…

MALICIOUS

PDF

111.6 KB Created: 2020-12-14 03:05:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ca1beacd02be2c376942b5089f1e0931 SHA-1: 9ce5f84a9a88d3a77ec29e6d2bdb0fcbe63de2b8 SHA-256: d410e845c46a17f17fc2dff67dc83b14c8f96931532c4353553a87e36d60a221
214 Risk Score

Malware Insights

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

This PDF file contains a significant number of embedded links, many of which point to external PDF files, indicating a link farm likely used for SEO manipulation or to distribute further malicious content. One critical heuristic identified a link to known malicious redirector infrastructure, and ClamAV detected it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and link farm suggest an attempt to redirect users to potentially harmful sites.

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
  • 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://traffking.ru/strik?utm_term=mole+calculations+worksheet+a+level In PDF document text
    • https://gagegopered.weebly.com/uploads/1/3/4/8/134880179/vubodali-remutof-ranevinot-dijafilesupepo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380073/normal_5fc412e29b684.pdfIn PDF document text
    • https://nevutero.weebly.com/uploads/1/3/4/7/134716167/f857a33582c6.pdfIn PDF document text
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/gabemomigipenaguv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376371/normal_5fc7dbba16a57.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/a1e6d16f-62fc-42cf-afcf-d0d5ac622b6e/scottish_heinemann_maths_7_answer_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/330ef5e5-3f6e-4a35-a56f-4d3efed73b3c/the_faith_of_anna_waters_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9fee7e4-bb2c-49eb-afba-1e0e9f4962ea/37413179259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf25264c-73f0-4586-a5bc-a8679e0448df/bellsouth_net_email_check.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1377873-d54c-42ec-8ce8-77dfd6780e3f/86423376491.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/jitibefuxisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7febc8e-d52d-441d-9c1b-c05745356e89/101_indir_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b756416-8182-43ec-97f3-bef6a37fc995/tulurupelepijilixur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/733cd785-01dd-44cc-907b-6b050f80a2c5/85810788500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/290106a2-a294-4e44-b85d-376f1715979c/53365579447.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/reformas_borbonicas_caracteristicas_yahoo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aa74fc6-9c14-400e-9388-6610ff56cc52/54157300417.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_off00017726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17726 5108 bytes
SHA-256: 5a47f3606d73b44ea101112acda1e1fce6d07b4df5c84ef2a5981a9bb156ebfb
font_01_sfnt_off000188a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188A0 12092 bytes
SHA-256: 880d76ae2a86f535ed272ce4653235a9f8b8fe453b302c1a04e8104726f1dc42

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