Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e637751f7e3380…

MALICIOUS

PDF

76.1 KB Created: 2021-05-16 15:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f223c4313bd2479a97e18300c19b5205 SHA-1: bbc96039c797f2bc850acb13609fe5a1ce40d1b9 SHA-256: 27e637751f7e338045a5ec8f457b68c8809ec629f159c2046327da8c8f27915a
136 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to an SEO redirector. The embedded URL and the document body suggest a free download scam related to rock climbing exercises. While no scripts were explicitly extracted, the presence of PDF-specific malicious indicators and the nature of the redirector URL strongly suggest a phishing attack.

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://lozipotod.ru/strik?utm_term=rock+climbing+training+exercises PDF link annotation
    • http://bostpolamos.site/gefusaxafazamirajodimemuvh7voe.pdfIn PDF document text
    • http://cookwellbakewell.com/kirkland_hearing_aid_instructions5djb7.pdfIn PDF document text
    • http://byt-upak.ru/84288225604dbpfi.pdfIn PDF document text
    • http://drenajkrasnodar.ru/77715768977iyibp.pdfIn PDF document text
    • http://dutov.org/niribigubipalazizp7xd.pdfIn PDF document text
    • http://lnstagram-verifedbadge.com/40556465561zadba.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://relax35.ru/how_to_prepare_for_a_cna_interviewp8sh1.pdfIn PDF document text
    • http://masito.space/buwolowuziminvkkd.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/kizugokofo/19210023684.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/38198091792.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/lezazetijab.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/led_edit_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/weather_report_in_chennai_today_and_tomorrow.pdfIn PDF document text
    • http://ropupifalapoges.atwebpages.com/wopemim.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/tamijawuzis.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/vuzezeluraraxenowepamawab.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/17637576638.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/wwe_bleacher_report_smackdown_live.pdfIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/vonemelawaxi.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_off0000ebf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF2 5400 bytes
SHA-256: 88d6521bd99cc916a20ebbde0899effa1ab8f2729a21fa64c8aa30fcc18fb673
font_01_sfnt_off0000fe45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE45 10840 bytes
SHA-256: 7c49ac029050a3f05c5d4b14f7541bd53f751515e67599266f3b43f28be82f4c

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