Malicious PDF — malware analysis report

Static analysis result for SHA-256 3da0b948f6e3069f…

MALICIOUS

PDF

75.6 KB Created: 2021-03-15 04:23:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3f181ab2d089b7431b1da22d7be6a5f9 SHA-1: 12abd1d0e7aa37dbd957afd1aac70353b0211937 SHA-256: 3da0b948f6e3069fbdb50297dfab624b7d3f8db0fa26e7a5114275086a56002b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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://pelibifir.ru/wix?keyword=angry+birds+best+unblocked+games PDF link annotation
    • https://cdn.sqhk.co/lojenozasila/gf4HidL/lujiwelurigim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408990/normal_5ffc21481bb0e.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/lJNhfcL/87613247347.pdfIn PDF document text
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/vovubabatabova.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/y7hbbha/bugis.pdfIn PDF document text
    • https://lusanazuwade.weebly.com/uploads/1/3/4/0/134000197/1513253.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/igFigNj/lixorega.pdfIn PDF document text
    • https://cdn.sqhk.co/tesolivu/pMYYdhb/simple_responsive_html_css_templates.pdfIn PDF document text
    • https://cdn.sqhk.co/tamikoveken/3ha0O7m/meiosis_and_genetics_review_worksheet_answers.pdfIn PDF document text
    • https://tadadali.weebly.com/uploads/1/3/4/0/134095934/7f10ab5.pdfIn PDF document text
    • https://kazodorog.weebly.com/uploads/1/3/4/9/134904699/1485191.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472774/normal_6007e0001c9b3.pdfIn PDF document text
    • https://cdn.sqhk.co/lutadamafe/mvUVujc/easy_hot_chocolate_recipe_with_cocoa_powder.pdfIn PDF document text
    • http://vobarijijagurar.22web.org/alliance_alive_recruitment_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/dasekizob/ifgivwx/cima_case_study_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415327/normal_6035c859995d4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/45648534452.pdfIn PDF document text
    • http://gupexofuvesok.epizy.com/31364198591.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/34145662974.pdfIn PDF document text
    • http://sufumawug.epizy.com/5591504149.pdfIn PDF document text
    • http://tiwogiponifi.rf.gd/nanize.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79E 5552 bytes
SHA-256: 1cbf6c8f8bb749f650a47bc8901c2532f446c4a3f3e27d1e08e3220b9fc42f8e
font_01_sfnt_off0000fa7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7C 11356 bytes
SHA-256: 04a6cd71e1d070012bd0368753b8908287eee7be5c465a74c09061fae998dad6

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