Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc815c38834e026…

MALICIOUS

PDF

43.5 KB Created: 2020-11-02 21:57:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6b0bb9ec6933b1b6818f4919cae7059a SHA-1: d45760f7510eda17772a8432af3aa7123af9cbe6 SHA-256: fcc815c38834e026a603e69c6be88119dd65b4eabf1343534bb03f2db0d46ccd
192 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure 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 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://gettraff.ru/aws?keyword=download+manager+apk+pc In PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/1039323.pdfIn PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/4211937.pdfIn PDF document text
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/mawarepoxilunu-jexituz-viranuzepakepox-guwoxe.pdfIn PDF document text
    • https://gizojobov.weebly.com/uploads/1/3/4/4/134436228/lodeguxezamiseli.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/lutudozof-zoragikiwota.pdfIn PDF document text
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/tolazudo.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/navexarozubuzupo.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/4495063.pdfIn PDF document text
    • https://jutebipofan.weebly.com/uploads/1/3/4/3/134334370/1f0f732fd645060.pdfIn PDF document text
    • https://mivoxoxez.weebly.com/uploads/1/3/4/3/134340481/9497583.pdfIn PDF document text
    • https://sonujesenusa.weebly.com/uploads/1/3/4/3/134344018/3813202.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/firigugixujotov/brian_bacon_oxford_leadership_academy.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/76046350669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bfdaf7e-719a-4fff-8f92-275cdebfa461/educational_research_quantitative.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/buluwaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14554838-80ff-4c3f-813c-4c5cd2dc977f/36849605507.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_off00006919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6919 5372 bytes
SHA-256: 7266ae0bab2526740a0b7e58f92a97c24ee95f9a3045f71ebe90239fb8f1d77a
font_01_sfnt_off00007b64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B64 10992 bytes
SHA-256: 7561369a53e7797fd08bff6fefff71362f8cdf10deff891066846e1b53645162

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