Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f7850e0603b090…

MALICIOUS

PDF

73.3 KB Created: 2021-02-22 00:30:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bdd3589567973dc51cca3715a301186b SHA-1: c87971b7720c2ce832e85fb12081365925a6a1fc SHA-256: 95f7850e0603b0906e659760ae055aa0b8ae88245d8b5c9ee538975bc6b97cf8
136 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI and a high-severity heuristic indicating an image lure linking to an SEO redirector, which points to 'https://seumenha.ru/strik?utm_term=netgear+wnr1000v3+repeater+mode'. This suggests the document is designed to lure users into clicking a link, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/strik?utm_term=netgear+wnr1000v3+repeater+mode PDF link annotation
    • https://cdn.sqhk.co/todusukiraxi/jhihg4c/talking_dog_movie_animated.pdfIn PDF document text
    • http://wesadozazizubus.iblogger.org/64054676028.pdfIn PDF document text
    • http://goodnatural.space/juegos_educacion_fisica_para_nios7v38a.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://guzeberipavol.rf.gd/narutelivulolawuvokojoz.pdfIn PDF document text
    • http://xuwugufufokiti.epizy.com/pufexumoputeka.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/jomimorexejivasitiwokax.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/29317104201.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/56992140880.pdfIn PDF document text
    • http://vobujilub.epizy.com/89809955774.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/black_color_wallpaper_android.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/article_writing_format_ncert_class_8.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45D 5288 bytes
SHA-256: a3255a9c2f388b74ac7504f0e2b4d5d06f76b346cb288333cc3b12fba9a9c971
font_01_sfnt_off0000e65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65C 10416 bytes
SHA-256: 8c06da015a573466be6b380fc90d4032f526716a04692e3813e2cace2bee00f0
font_02_sfnt_off000109e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E7 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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