Malicious PDF — malware analysis report

Static analysis result for SHA-256 b179d6a77a8b2e96…

MALICIOUS

PDF

78.8 KB Created: 2021-03-17 08:42:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b2cc0d6dbaff902b78d36595544b65c9 SHA-1: b4e0a139d953b4c9ec80a583dcf0ee1ae6c33422 SHA-256: b179d6a77a8b2e9609a223916960cf104af50618d2c757cf2bbee0da6508ea81
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The primary URL, 'https://soxebez.ru/strik?utm_term=how+to+draw+a+komodo+dragon+step+by+step+easy', is presented as a lure. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate a malicious intent to redirect users, potentially to phishing sites or malware downloads.

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://soxebez.ru/strik?utm_term=how+to+draw+a+komodo+dragon+step+by+step+easy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369775/normal_5fda841846ff4.pdfIn PDF document text
    • https://tejikapor.weebly.com/uploads/1/3/1/3/131382395/2587210.pdfIn PDF document text
    • https://pedagojewixa.weebly.com/uploads/1/3/1/3/131398360/664b7925bfb5c51.pdfIn PDF document text
    • https://boderaraza.weebly.com/uploads/1/3/1/4/131454415/mifapumivepibi.pdfIn PDF document text
    • https://wujawosekeg.weebly.com/uploads/1/3/4/7/134712458/69ea9d121.pdfIn PDF document text
    • https://mikofamix.weebly.com/uploads/1/3/4/8/134882663/9490867.pdfIn PDF document text
    • https://tiforunu.weebly.com/uploads/1/3/1/4/131437018/5032242.pdfIn PDF document text
    • https://divekoworubu.weebly.com/uploads/1/3/4/0/134017674/176ebec721b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379486/normal_5fe5a37f509e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473415/normal_5fcd7f82251e2.pdfIn PDF document text
    • https://purapunebofo.weebly.com/uploads/1/3/4/8/134888030/8660215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485929/normal_604120594e6e3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/rininabokojaxerejove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0af33d79-15f7-4401-9b22-ec296616f789/filosofia_del_derecho_penal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0448210c-2779-413e-a35b-717b02165be9/vilakogumabukizanaxok.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/canada_citizenship_study_guide._com.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/beadboard_sheets_at_home_depot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a90eb396-b7a9-4831-8320-ee33e7784a82/zmodo_wireless_security_camera_system_installation.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/already_just_yet_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5eebeb0-7884-4976-8a76-9908d1dc4a17/what_month_are_beets_ready_to_harvest.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96F 5348 bytes
SHA-256: 368ffec43544bef87f83965c1458541ebbe77dd0dd4f02999fda4f96b5ed597c
font_01_sfnt_off0000fb93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB93 10036 bytes
SHA-256: 4475119e1e405adb9348d6fb8b5f1b3f5cf33dab7e21758ab18b4bcb7cd6e8bd
font_02_sfnt_off00011df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF9 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3