Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e9846e4040a60a…

MALICIOUS

PDF

75.0 KB Created: 2021-03-22 22:26:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4a02a96b98ecf3b233080f69ec31243f SHA-1: 56915884310423114272dedd6676df6aa28b41d0 SHA-256: 29e9846e4040a60ab0ea3e73d8d6d228cb3d93c72a098407e2c75ffb905728b5
186 Risk Score

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 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://seumenha.ru/123?utm_term=dynamics+ax+365 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413005/normal_5fee001fbf841.pdfIn PDF document text
    • https://wadumajaniko.weebly.com/uploads/1/3/1/3/131383958/1987861.pdfIn PDF document text
    • https://nigapabibaba.weebly.com/uploads/1/3/4/9/134903053/menorusezasuwasobu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454684/normal_6044ded2a70cb.pdfIn PDF document text
    • https://sudomudes.weebly.com/uploads/1/3/0/8/130874284/8226639.pdfIn PDF document text
    • https://jumaxejew.weebly.com/uploads/1/3/1/6/131606465/2491197.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_ff6000bb6bce4cf0b592d06dab3aa8b7.pdf?index=trueIn PDF document text
    • https://807eaacf-9fb6-4e16-bcb8-061395d1d132.filesusr.com/ugd/a3ef2e_899bd4f62c7f45129d900413c2fa5320.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nademopor/dixotijulefuwezufeli.pdfIn PDF document text
    • https://1a899ca6-11bf-4464-971e-4bf0b885e765.filesusr.com/ugd/4ac3ff_f511fb595fec489591c24021f1af3be7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b25d4642-dba0-4940-ae41-ceb56aeb3d0c/christmas_carol_video_songs_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40ef372b-bb2c-4782-b71d-653c7096eefd/honeywell_th3210d1004_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/zetemelunita.pdfIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_f77e143850094aa0b1120e6bcf4edde0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/84195999538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0812b560-869f-46e4-9b49-467971d60445/57512278844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efb0e88a-4f44-4845-8e08-90a19acf11b5/dakapekezinojaxerizaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6642ad42-199e-4520-b1d2-2af21ee68811/how_do_you_draw_on_the_right_side_of_your_brain.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/baxixazaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68b8d6f2-7319-429f-86e5-bf5242e2a847/download_dell_latitude_e6430_drivers_for_windows_7.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_off0000e7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F6 5428 bytes
SHA-256: 6f17932ab38bd94b719a041e568fea41b2f41d8790e42dd5087926ff25754947
font_01_sfnt_off0000fa73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA73 10728 bytes
SHA-256: 10d03c40f6980725fffbf656da2e1c6bd412e76810f3e10daacd08db9909b547