Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7698602f405eea4…

MALICIOUS

PDF

82.0 KB Created: 2021-04-27 01:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a0e603834a48eef9d294937e0527e209 SHA-1: 9ac661e6f85a9f394dd72daacb091aa42940bef2 SHA-256: f7698602f405eea4e6a8f32f770d66e49e767613cb435613a1d369ed2f02d47c
136 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it's a phishing lure related to hair growth products, directing users to an external URL. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI point towards a phishing attack, likely using a social engineering pretext to deliver a payload or steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://nipisod.ru/strik?utm_term=does+chi+silk+infusion+help+your+hair+grow PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404488/normal_60513759730e9.pdfIn PDF document text
    • https://cdn.sqhk.co/fatepotax/hdjjgtz/fuzojud.pdfIn PDF document text
    • https://cdn.sqhk.co/jorisuzil/e4PNjfu/dagamo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414487/normal_602740d4c8182.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406168/normal_5fcb988cdd220.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/hcyhew5/t_mobile_first_responder_doctor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467274/normal_5feeee8c51354.pdfIn PDF document text
    • https://cdn.sqhk.co/sinupupuzaxa/84vicS6/vaxagoxawimiravesu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375891/normal_603fa7cb33bbc.pdfIn PDF document text
    • https://cdn.sqhk.co/rewanizotaj/jhaKjbm/94165530679.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/giibjjO/nefosinepiwexufabulejaser.pdfIn PDF document text
    • https://cdn.sqhk.co/ranamifujuki/jA1Bkig/talking_cats_play_patty_cake_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/jayJdgh/imdb_movies_to_watch_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/sugojipo/6kibTbl/32490604066.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/28baca47-9690-4b8e-801f-ab783e452fb9/honda_em650_generator_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60002389-dc9b-4dfb-ae77-984ffbc1dbb4/95814404623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dde6d51d-b983-45c3-83cf-8218d23858f8/why_is_my_dryer_not_blowing_hot_air.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d410ec44-7807-410e-b7ef-799790c28645/mijipaziloled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42c0fd96-21a3-4417-8aee-c40b15732f61/kenmore_window_air_conditioner_filter_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82953a73-b14b-4871-bcee-6a926358ff44/74221134544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5b05302-fbce-4585-95f1-b5b07b58cd13/mozafoxefijuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd966d06-45b0-4f51-b0e8-f77756585ca2/what_is_business_according_to_different_authors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e72bb25c-b4f4-4ead-996f-2a8c70898b01/zirevezus.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_off00010425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10425 5536 bytes
SHA-256: f7032d495cf92f822309b84f53cab159eeffa95fa182feeb96498de88358c88c
font_01_sfnt_off00011719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11719 10392 bytes
SHA-256: e29702cd775bfc7f99b9901d8e0d66208bda81c3b263f0a2365dc31a2a7d02a9