Malicious PDF — malware analysis report

Static analysis result for SHA-256 db40ecb6a485d27e…

MALICIOUS

PDF

68.0 KB Created: 2021-05-27 11:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: aef4b0a61765971d8dd8b40d6c66c848 SHA-1: 556435db2cefe9b7ee7b073d66b1b05ae0a10f12 SHA-256: db40ecb6a485d27e6c0f1b9512fcbddcaf6f891f96f8c562bd1bdba08fa4437e
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 0.9997

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://crophysi.ru/strik?utm_term=how+to+log+into+minecraft+education+edition+with+school+email PDF link annotation
    • https://fuxusololozo.weebly.com/uploads/1/3/1/3/131380606/xosiwumikewerobarawe.pdfIn PDF document text
    • https://jixejuterekafiw.weebly.com/uploads/1/3/4/5/134508928/7760984.pdfIn PDF document text
    • https://sejirefado.weebly.com/uploads/1/3/4/6/134682993/medemotogi.pdfIn PDF document text
    • https://gaturavokig.weebly.com/uploads/1/3/4/3/134317265/mowuvigulisetoz_belowu.pdfIn PDF document text
    • https://boripate.weebly.com/uploads/1/3/4/5/134590871/4390459.pdfIn PDF document text
    • https://nofevezim.weebly.com/uploads/1/3/4/7/134770192/gufaji.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/302eeedb-8b03-4661-96e6-663f06379528/vemekapelupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1824fe7c-461e-42df-a146-0583866b7529/wugiwewaseviwuwovadano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6428da30-99de-4411-83ab-7838ccd63deb/nenekogajujuluz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7abc38da-01c1-406f-a629-2e76b5bcd2c4/why_is_my_washing_machine_not_draining_properly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b9070ed-9523-4524-b59a-94f1f431d3fc/lord_of_the_flies_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd9cbca8-3076-4519-b465-dedaf4191446/61051911405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1faeaf0-eaea-4a5c-b17b-25828dc7ded1/kiss_the_rain_kalimba_cover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d52b0573-df14-4c67-a167-0610ba745a19/21388179841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c456011-e903-4d90-9420-8a46b614aee4/15866788351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f4f892c-a2e5-4b68-9a10-d24bd5bec0c2/will_x_going_to_exercises_multiple_choice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3922d819-5af8-493e-9cfe-1355c192659e/what_is_the_best_obd_diagnostic_tool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2ddde08-74c2-45d2-b28d-265e459ec741/samsung_syncmaster_p2770hd_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6465aae7-1150-4f1b-8942-a8d595ffb2db/6748241677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13c416d7-41b9-449e-8e75-d5198e529eb3/23591970953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e710ad6a-4cdf-473e-b45e-7086b539924b/82617046566.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_off0000cc97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC97 5488 bytes
SHA-256: bb968ac4119cdd5e4f417854f599f7e77a4bcc195a7bc959471124ca658f41de
font_01_sfnt_off0000df27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF27 10276 bytes
SHA-256: 0cc6642c9c743359103ba21a6cb87a14c03fc437d8505950f06c3ae5f45a15a6

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