Malicious PDF — malware analysis report

Static analysis result for SHA-256 8573bba374a8f682…

MALICIOUS

PDF

81.2 KB Created: 2021-03-09 23:50:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6c24055f276d492bceaec59bb353d2e2 SHA-1: 5a1864d2551ae1858b8ea2d08706de9cf41e7a19 SHA-256: 8573bba374a8f682a0bc693395a938026ca2d5ce45fab8b14cc504eec6bc203a
156 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 0.9993

Heuristics 5

  • 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.
  • 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://resalured.ru/123?utm_term=american+action+movie+2018 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393503/normal_5ffaaf9a3097b.pdfIn PDF document text
    • https://zunimivivonuz.weebly.com/uploads/1/3/4/0/134017399/36949e42c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414860/normal_6003879dc35ad.pdfIn PDF document text
    • https://nuzukozifazo.weebly.com/uploads/1/3/2/6/132682871/wixakavezaret.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379855/normal_6027b19e713cf.pdfIn PDF document text
    • https://denesibupu.weebly.com/uploads/1/3/0/7/130774977/nuvarosakevajid_dufevevava.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456372/normal_5fcd7a5f1f07b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_600a89f474d44.pdfIn PDF document text
    • http://povarususev.22web.org/ketaxilawavumiposavi.pdfIn PDF document text
    • https://rigopodi.weebly.com/uploads/1/3/4/3/134307943/tafemes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470389/normal_5fd9753e4e434.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_6035c76193546.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457590/normal_5fc94aaaa4c36.pdfIn PDF document text
    • https://rirokenu.weebly.com/uploads/1/3/5/3/135349909/rimabanil.pdfIn PDF document text
    • https://panikelixiguju.weebly.com/uploads/1/3/4/4/134478359/fowegotemawesu.pdfIn PDF document text
    • https://befukifesili.weebly.com/uploads/1/3/1/4/131453358/5538340.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419633/normal_602cf803634cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368760/normal_5feda0a6db842.pdfIn PDF document text
    • https://kadefevexenikoz.weebly.com/uploads/1/3/0/8/130813118/libosijo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_60160c0583734.pdfIn PDF document text
    • https://musevupuli.weebly.com/uploads/1/3/1/4/131438528/xigalovefikafepeved.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452835/normal_5fff6e3af2a33.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://temurilosepe.rf.gd/98526925018.pdfIn PDF document text
    • http://xukomaro.epizy.com/67620381484.pdfIn PDF document text
    • http://pivesezo.epizy.com/xebewuxifipukisip.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_off000101fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FB 5304 bytes
SHA-256: bc66c37a95f66630a2b13f1f9ec1009f3280d7edc61e48de6d014b96857f56b7
font_01_sfnt_off000113f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F6 10340 bytes
SHA-256: 6762aa1723f87adc90361e65d37ca27331479a06609d01772c30d963a1da4961

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