Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b7cb3918c30e3e…

MALICIOUS

PDF

83.4 KB Created: 2021-03-16 06:27:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9391c898430449c6facffdace6a16e13 SHA-1: 1096042af52a6e9160a5fc959bb9a33915721f82 SHA-256: 74b7cb3918c30e3e1ea64e51ccd164bbf049e92cdd1c864fb8e449eacbca8d99
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. One of the primary URLs, 'https://mezovuduw.ru/123?utm_term=besharam+full+movie++online', is presented as a lure for movie search results, which is a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/123?utm_term=besharam+full+movie++online PDF link annotation
    • http://muzibatixabu.mypressonline.com/46893957032.pdfIn PDF document text
    • https://cdn.sqhk.co/nasonamav/3hjz9DD/78772338918.pdfIn PDF document text
    • https://cdn.sqhk.co/nizufalagef/gjfijjj/poblacion_microbiana_definicion.pdfIn PDF document text
    • http://xonejalevesezom.sportsontheweb.net/cast_of_power_book_iii_raising_kanan_premiere_date.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duxepivol.myartsonline.com/84525520203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b82e546-5b54-477f-a93a-dd375d8b6fc9/hisense_portable_ac_user_manual.pdfIn PDF document text
    • https://b6086c54-8ef4-40f3-ba18-bbbb993b339e.filesusr.com/ugd/36e927_e40ce5325809410696f0f9d443f93272.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/89786194788.pdfIn PDF document text
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_20bd428fcf76449b9198cf0dae8d0b30.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa87f41d-3ce9-46a4-983f-75d8858ab5c5/dymo_labelwriter_450_turbo_support.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/numbers_1-_10_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e367e4b-cde7-494c-a439-2130df4c49ca/what_do_chinese_lanternflies_eat.pdfIn PDF document text
    • http://rinimodosejowuf.myartsonline.com/current_affairs_cloud_download.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/john_deere_850_tractor_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f56c25e-4086-45d1-a589-a359d3ddbfa6/bivadiwowiziz.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_off00010996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10996 5116 bytes
SHA-256: 34b940c9a239e79932fbc5788c675a428076336e89d8f6828fb3021425c9adc4
font_01_sfnt_off00011add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADD 11316 bytes
SHA-256: 16d78ef99fe9b33cc0815d2c9024022ae3c0b77fba6735f4f75b37218e13431a

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