Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c1e678581b66bd1…

MALICIOUS

PDF

77.6 KB Created: 2021-03-17 17:44:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e26cbc6896012be87466b3a786c7d0db SHA-1: b1228b1f6558adfcbbc7c73193c139d0ef1d6a1e SHA-256: 8c1e678581b66bd1139de03452412c5fff4e879486e5fcfc5059ceeffce7be9d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it's part of a link farm designed to redirect users to potentially malicious sites. The primary URL, 'https://gimoguvi.ru/strik?utm_term=how+much+should+it+cost+to+repair+refrigerator', appears to be a lure for phishing or scam activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/strik?utm_term=how+much+should+it+cost+to+repair+refrigerator PDF link annotation
    • https://vexusonefopi.weebly.com/uploads/1/3/4/5/134583249/8584211.pdfIn PDF document text
    • https://porilijure.weebly.com/uploads/1/3/1/6/131606314/1282924.pdfIn PDF document text
    • https://xefigokilevugez.weebly.com/uploads/1/3/5/2/135299251/vugorusapevafa_xiwodidox_kepivorokovi.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/1576939.pdfIn PDF document text
    • https://pagafamowadaf.weebly.com/uploads/1/3/4/8/134878907/pabep-mufemi-dabiwu-sujejozalexirer.pdfIn PDF document text
    • https://fidovasunub.weebly.com/uploads/1/3/0/8/130815093/7002171.pdfIn PDF document text
    • https://lefipejime.weebly.com/uploads/1/3/4/6/134668800/jagodozugiv.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://c8d0f166-86fd-441b-8df5-aa5e6c6c7644.filesusr.com/ugd/f4b3af_f070e77532bb45a0b6694f2b6cafd300.pdf?index=trueIn PDF document text
    • https://22520ec4-2132-45a5-98b8-54db1b71d3ea.filesusr.com/ugd/b33b96_551205b86af1423e8728a6ed272c66fb.pdf?index=trueIn PDF document text
    • https://e5aadbcf-511f-4ee2-989a-4410a22eeed0.filesusr.com/ugd/64930c_875a9bc303c94ce6a944f37cd321f01c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0daebe33-e60a-487a-ad52-6e319516ca20/how_do_you_adjust_a_square_d_well_pressure_switch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccc9cc00-c07f-4c1a-adee-e0a4f53bdec1/sebevopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/695de2cb-0b68-4f37-9ad7-95a011e540f1/wogivemifaxuwobon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06af6670-59cd-4f96-94cf-f7cf027b5fc0/gonesi.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/58964125365.pdfIn PDF document text
    • https://0b670cc3-d94b-4117-8b98-7ce677fb6c21.filesusr.com/ugd/7bc559_91632c4d4d1d4737b936e23eb1387dd3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zasepo/kitchenaid_superba_water_filter_install.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6602b626-9f7f-4bf5-a522-07cf033c1c07/vofovekefa.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/selenium_webdriver_javascript_automation_for_beginners.pdfIn PDF document text
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_91318e30042d4cebaf4ad1c5bcabcfd5.pdf?index=trueIn PDF document text
    • https://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_5a2f093d784e42629e100104328db922.pdf?index=trueIn 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_off0000e460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE460 5400 bytes
SHA-256: f703e64bf5f817eea309a7027a4fb537f3720108be662141cb7f3a107e1bd137
font_01_sfnt_off0000f6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CD 10564 bytes
SHA-256: 4111df73f200115af21f1b816f60cfaba8a1b6e6a9108f913a0ae368a1b690bc
font_02_sfnt_off00011ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE0 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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