Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1bda879221e17f9…

MALICIOUS

PDF

40.4 KB Created: 2020-11-06 21:50:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6fcb030f6ead076f7f0306c4a7911d62 SHA-1: 14c359dda7458428fe2d45c697373666d3e04ea6 SHA-256: e1bda879221e17f9fdfc5920e08cacbec4f6627fd67267746681d8a3bac32615
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffine.ru/aws?keyword=strike+force+4+hacked PDF link annotation
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/8497750.pdfIn PDF document text
    • https://gazapaxinu.weebly.com/uploads/1/3/4/4/134475358/kinipisovuratig.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/kixotukibibev.pdfIn PDF document text
    • https://zigegawemofeza.weebly.com/uploads/1/3/1/4/131406932/fajine.pdfIn PDF document text
    • https://ruzunaxatan.weebly.com/uploads/1/3/4/3/134340268/32fc327848.pdfIn PDF document text
    • https://seroselek.weebly.com/uploads/1/3/4/6/134636573/1200482.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/e52c73b7-84e8-4614-a247-20f2d85f412e/44770566239.pdfIn PDF document text
    • https://fimalul.files.wordpress.com/2020/11/xenikefeg.pdfIn PDF document text
    • https://wuzemasotiwa.files.wordpress.com/2020/11/geneligojumotufitujoleno.pdfIn PDF document text
    • https://pozajifu.files.wordpress.com/2020/11/vetuwidibudilokegugonano.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/delekowebuwerur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06c140ee-390e-4529-9194-716be036708d/60627073794.pdfIn PDF document text
    • https://gefonan.files.wordpress.com/2020/11/48781763133.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_off000060c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C6 5156 bytes
SHA-256: 110ec4965f529b27011ac5a9b00491643c89eca6f7d8e2348e3a088d21a9cd60
font_01_sfnt_off00007255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7255 10048 bytes
SHA-256: c9dddbf2aed5164630673abe4581700cae59e3bfb09bd660ac561f8713c1029b

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