Malicious PDF — malware analysis report

Static analysis result for SHA-256 138f7935dd88819a…

MALICIOUS

PDF

75.7 KB Created: 2021-03-02 04:27:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 49e8fc9bd5d726f0760e9abe523e912e SHA-1: 97930bcdac4a70dec1f46ad9501ee61dd7ff5fa0 SHA-256: 138f7935dd88819a2339b16ebcc5c4454469fcf27b7aaec0eae4762014ab325c
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to suspicious domains, including one that appears to be a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to the embedded URLs, suggesting a lure to a malicious website.

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://mezovuduw.ru/wix?keyword=electric+air+fresheners PDF link annotation
    • http://ebay-coupon.ru/vabidabobdhk67.pdfIn PDF document text
    • https://fifimijo.weebly.com/uploads/1/3/4/7/134748793/gekipisemu.pdfIn PDF document text
    • https://vanuludegevu.weebly.com/uploads/1/3/0/7/130776818/rejidom.pdfIn PDF document text
    • https://riwinimogo.weebly.com/uploads/1/3/0/9/130969841/pumigefufemineva.pdfIn PDF document text
    • https://lefagetali.weebly.com/uploads/1/3/2/3/132302894/siwamore.pdfIn PDF document text
    • https://vopesowe.weebly.com/uploads/1/3/4/6/134638419/dikadodomume-fipozibapotag-juxexam-papazaz.pdfIn PDF document text
    • https://surinulijo.weebly.com/uploads/1/3/4/6/134648677/lipeliwot-bunanavile.pdfIn PDF document text
    • http://effektzhizni.ru/58530656469ypc22.pdfIn PDF document text
    • http://wide-take.top/68453890631v1pg6.pdfIn PDF document text
    • http://daimontimur.org/30652351632dihwr.pdfIn PDF document text
    • https://vapulorefemefiz.weebly.com/uploads/1/3/5/9/135956910/efaf1996ef226b2.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/petsafe_smart_feeder_offlinebzer1.pdfIn PDF document text
    • https://rosufira.weebly.com/uploads/1/3/1/4/131408230/mupemadufo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/patilawasu/junapijuwusexutaxime.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/telipogumebix.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/roll_number_in_icse_marksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/glencoe_health_chapter_15_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/94392766393.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/cell_membrane_potential.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_off0000ee92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE92 4924 bytes
SHA-256: 51929ec7ce21cee9ddd793b311a7ad694bf5c01b19fb21190c4da5fc9780251c
font_01_sfnt_off0000ff4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4F 9992 bytes
SHA-256: 0470ed00f095263d6bf80bbd8d384ff056ee970c209d3c4bded98b96c073e778

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