Malicious PDF — malware analysis report

Static analysis result for SHA-256 1450b5f64c585b34…

MALICIOUS

PDF

74.4 KB Created: 2021-06-12 12:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: cfc04443c7ff593866bd68a2e1be5ff9 SHA-1: 8b1c3b25dac252332ada63a0b74e68a3e5d863d4 SHA-256: 1450b5f64c585b34b15d9299c81958e917bdf2e5df46ed46b99a5cbc9ddac8a1
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed to redirect users to malicious sites. The embedded content, though heavily obfuscated, appears to be part of this lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://oniceh.ru/pbw?utm_term=psp+iso+wwe+2k18 PDF link annotation
    • https://zikagedatudupoz.weebly.com/uploads/1/3/4/2/134266226/2748981.pdfIn PDF document text
    • https://gizunujidibe.weebly.com/uploads/1/3/0/8/130814387/jajuniwidijed_pokajifokoj_zudorezozuna.pdfIn PDF document text
    • https://fubalaxusagipun.weebly.com/uploads/1/3/4/1/134108832/pazamakovenabedaxas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419654/normal_60001ddfb3769.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415544/normal_60c1b601d62ef.pdfIn PDF document text
    • https://gipegilut.weebly.com/uploads/1/3/4/6/134699389/wobodawirijegumozo.pdfIn PDF document text
    • https://godebisexizo.weebly.com/uploads/1/3/0/7/130775633/3341322.pdfIn PDF document text
    • https://kanemonel.weebly.com/uploads/1/3/5/3/135319287/wubujuzebiviw-punuziveweva.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393369/normal_5ffa1f8986645.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/0508cd9d-354d-4751-9eed-e9871aa5a5d9/catalogue_of_the_flowering_plants_and_gymnosperms_of_peru.pdfIn PDF document text
    • http://rimikupababo.pbworks.com/w/file/fetch/144535089/varovavun.pdfIn PDF document text
    • http://lodenapokot.pbworks.com/f/jufukutomaret.pdfIn PDF document text
    • http://pinurakus.pbworks.com/f/sifexukilumivabom.pdfIn PDF document text
    • http://siseraxoru.pbworks.com/f/404764420.pdfIn PDF document text
    • http://sorawako.pbworks.com/w/file/fetch/144446406/best_free_anti_spyware_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9630ac4-6e60-4e43-b9ad-ff1b563e9256/72549356356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be397f24-4788-46d4-8905-a56820dcad50/1649776579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dea33e5b-e42e-477f-867f-3324b44a1204/free_easy_trumpet_sheet_music_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6efcaae-a32d-4cff-b3ee-b0094ee10991/why_is_vicks_inhaler_banned.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a6f58a5-8809-4709-ac6b-33a4def1bf54/napco_gem-p801_programming_manual.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_off0000e67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67D 5008 bytes
SHA-256: d00a7938e2aae5f455de41efb4ef132768c371f8febae9236ce52188d26835a6
font_01_sfnt_off0000f7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C4 10740 bytes
SHA-256: 139dcae2421ce86d6e8a6f924086d72d42b8bab610c0d79520a4d0fc6bf177f6