Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f6580d5f79e1cb4…

MALICIOUS

PDF

87.9 KB Created: 2021-03-20 07:06:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1e3b036ba84022ab59f398133670b88a SHA-1: 5aa6e9588ece821be95fc293f01a0c857c85a978 SHA-256: 6f6580d5f79e1cb4cbbb17c031fa22b9be065722b79fe61ad708718eeeafdd66
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 0.9991

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://golowaki.ru/award?keyword=impact+of+globalization+on+developing+countries+pdf PDF link annotation
    • http://lorewipa.scienceontheweb.net/blockchain_trends_in_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446649/normal_5ff5cd69f3d4e.pdfIn PDF document text
    • http://fortuneo.biz/1438007455licge.pdfIn PDF document text
    • https://posolefuriw.weebly.com/uploads/1/3/4/3/134374222/1f11a3f27744d03.pdfIn PDF document text
    • http://teenagetutor.net/28472047844o09xo.pdfIn PDF document text
    • http://gopadaxin.mywebcommunity.org/english_words_in_kannada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417643/normal_601936217ea66.pdfIn PDF document text
    • https://kuwofepex.weebly.com/uploads/1/3/2/7/132740654/4471052.pdfIn PDF document text
    • https://nufapapezo.weebly.com/uploads/1/3/0/9/130969462/ca031688b872a.pdfIn PDF document text
    • http://bestsaleshopin.xyz/59898491496b8sjd.pdfIn PDF document text
    • http://yandex-dostav.ru/manual_facial_cleansing_brush_reviews269xp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409826/normal_5ffc811bd1df3.pdfIn PDF document text
    • http://susekilimu.medianewsonline.com/vugonojebutoluxenopile.pdfIn PDF document text
    • https://cdn.sqhk.co/sinupupuzaxa/dibx0hd/riwume.pdfIn PDF document text
    • https://pafetujesotizi.weebly.com/uploads/1/3/5/3/135348857/sikavewanu_ruxivivi_kugevarejifar.pdfIn PDF document text
    • https://cdn.sqhk.co/gajamomol/fT60igU/89128175455.pdfIn PDF document text
    • https://pavadugubuwab.weebly.com/uploads/1/3/4/3/134309483/9293774.pdfIn PDF document text
    • https://bunogijadijis.weebly.com/uploads/1/3/4/8/134896562/nibutavenufanorij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392651/normal_5fce9ea841be9.pdfIn PDF document text
    • https://buvikibera.weebly.com/uploads/1/3/1/4/131453013/35e9e9392.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxomawelej/jjdejet/95566288784.pdfIn PDF document text
    • https://cdn.sqhk.co/zotenejek/idieysP/54152193067.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/7ijhj1e/don_t_touch_my_phone_wallpaper_apk_download.pdfIn PDF document text
    • https://tapogizixe.weebly.com/uploads/1/3/4/8/134897788/2100173.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2D 5660 bytes
SHA-256: d657a4580afa03ae738c70a5d74b82b437ffbff5468374c83799ecbcf50a5fd3
font_01_sfnt_off00012e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E65 10372 bytes
SHA-256: e27da04e8092febffe4717211e35dd9d656f641b757a117e704bebe7e1932d96

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