Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3aeed7da6f7800c…

MALICIOUS

PDF

69.1 KB Created: 2021-02-17 14:58:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c68c5bc2c131241090637539401e713d SHA-1: 15802bcaa1edbde1cb7aade62e62b8684f7d771a SHA-256: a3aeed7da6f7800c906372987810daf203eea1e04844951fcc922daa03f17967
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 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 0.9998

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 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://jottigo.ru/wix?keyword=gm+3+bar+map+sensor PDF link annotation
    • https://cdn.sqhk.co/kobewudojuvo/ehaijie/screen_recorder_screenshot_video_xrecorder.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473638/normal_600b2cf40102c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444098/normal_600a26258e580.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365536/normal_5ffe00531d9a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375699/normal_5fe60d6ae92d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4506063/normal_5fcb4a4e1b567.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxolusufa/hejdqig/39798837414.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416653/normal_5feed6879f817.pdfIn PDF document text
    • https://vivesajepud.weebly.com/uploads/1/3/0/9/130969004/luwuzojur.pdfIn PDF document text
    • http://salebox.shop/20658978578tbigf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449766/normal_5ff7d88b2b263.pdfIn PDF document text
    • https://cdn.sqhk.co/sibamoxa/chhgg3Q/63016612802.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373505/normal_5ff52c02c0b11.pdfIn PDF document text
    • https://nuguviroguzemek.weebly.com/uploads/1/3/1/0/131070089/gidutub-lasojibagoje-bixofisipek-xofinotox.pdfIn PDF document text
    • http://salonapp.xyz/18325307502u0l6n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459163/normal_5fff71997cdc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420441/normal_5fe809a52f047.pdfIn PDF document text
    • http://chelamela.org/51643480799gdl08.pdfIn PDF document text
    • http://goshop32.site/17399330117vlsqj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18B 5268 bytes
SHA-256: 40a80379f1532ebc12079b4add2591bf1173f7b149f983be5b38b3ab476e71e1
font_01_sfnt_off0000e359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE359 10592 bytes
SHA-256: f20b2b9e13ec99eca037bafc3c4ac3afe8b3cb9890e9df124628070a643e7694

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