Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47b1a91c6abbef1…

MALICIOUS

PDF

64.9 KB Created: 2020-12-11 22:08:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 28fb06b084a7518d9bf5bd0a45d70eca SHA-1: 53e093a7816d1e4810aa2eeb6211da362826a7a6 SHA-256: f47b1a91c6abbef1cd104a50c250305b103d76a9b37d737e5b363c0733d22999
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains numerous external links, suggesting it functions as a link farm or phishing lure, potentially related to "Michelin guide dc twitter". The presence of embedded JavaScript, though not explicitly detailed in the provided evidence, is a common vector for malicious PDFs to redirect users or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/aws?utm_term=michelin+guide+dc+twitter PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417995/normal_5f9a5fccb175f.pdfIn PDF document text
    • https://tubomomumaxef.weebly.com/uploads/1/3/4/5/134508744/tafepoxese_fineme_degumefemusemi_fudoxesitat.pdfIn PDF document text
    • https://rikidunojig.weebly.com/uploads/1/3/4/4/134488605/mixavatef-kefofego-bowefiva-zunawiwub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450337/normal_5fad785fe5aa9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368235/normal_5fc901d5447ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380890/normal_5f99757947185.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380076/normal_5f8ed3197a8b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411700/normal_5fa9c2a282c53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445733/normal_5fab7f870bdb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446649/normal_5fc3df9827ac4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409610/normal_5f92c5f61fa9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386595/normal_5fc0967c600d6.pdfIn PDF document text
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/59882792d7752.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408177/normal_5f9d3b8fb60e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f9ae3ce39d40.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB458 4680 bytes
SHA-256: da811ef284473856966d8ccd9236b55e93689a6a66dd37c237f5706f83d31b34
font_01_sfnt_off0000c43f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC43F 10212 bytes
SHA-256: d1b765f7ee348fb68a52dac2ac07eaa0cbf5b258dde50babe77d790d15f2daba
font_02_sfnt_off0000e6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D8 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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