Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd4a9ceb2092bcc…

MALICIOUS

PDF

75.2 KB Created: 2021-06-13 23:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f1925e1ab119b1adc930e908610ac1cf SHA-1: 6c513899cdcbd936a16f4561d453babfc86433e3 SHA-256: ebd4a9ceb2092bcc7ffeadb65fec93ca59354b11013f8544030e92da8f5ad9ce
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ketchas.ru/pbw?utm_term=baldi+granny+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450632/normal_60402dde9626f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391611/normal_5ff1de4f2afd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384480/normal_5ff436a4889e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451561/normal_6025985fb4609.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455380/normal_5fec019118104.pdfIn PDF document text
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/7191127.pdfIn PDF document text
    • https://pukizorot.weebly.com/uploads/1/3/1/3/131384201/pexoduregilifi.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4422884/normal_60b4be3e6141d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379859/normal_5fccf78b0025d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527164/normal_604f200641344.pdfIn PDF document text
    • https://nozinogut.weebly.com/uploads/1/3/1/1/131164424/25b677b8.pdfIn PDF document text
    • https://pexikonafan.weebly.com/uploads/1/3/4/3/134351575/1867050.pdfIn PDF document text
    • https://tipezigixak.weebly.com/uploads/1/3/4/3/134339593/cc1119eb.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/40042cf9-01bc-43f3-92ca-1e4f6339f8c7/how_to_clean_eureka_bagless_vacuum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eda7293-2556-423f-9735-a374434fc229/wigajijetiwizuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd85aa2b-eff3-425b-91ea-26d059a78375/pajoxinikitosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd0f4a1b-443a-40b7-9613-2668032bb92e/rafabopit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4940d2de-82de-4913-a877-fef78f80475d/actron_scanner_plus_cp9580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e1b40a5-851f-4414-b382-0a13e328cf4e/reading_street_grade_5_grammar_and_writing_practice_workbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f238bf4-aba6-482a-8c4c-24f671d99b4e/what_is_the_main_idea_of_twilight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94f3a0ae-68dd-40ed-a982-8e0dce7f660f/xikener.pdfIn PDF document text
    • http://zuvuzut.pbworks.com/w/file/fetch/144621183/exemple_de_plan_dun_mmoire_de_licence.pdfIn PDF document text
    • http://detomipipu.pbworks.com/f/64689207115.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84c67063-77b5-4e97-8408-fb5a25dfe608/65811068491.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_off0000e878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE878 5056 bytes
SHA-256: 7916eddebd6c7341caff27d0b2184a83f1a4febbfd6044943be4594a5da3dd8a
font_01_sfnt_off0000f9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CE 10876 bytes
SHA-256: 80b077af26fb911ed107805a90e0bcfa1d203b8963d898c5ec2fb02b8cec460f