Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2220554868164f9…

MALICIOUS

PDF

72.8 KB Created: 2021-01-19 10:31:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5895958265133f15a3f201ec6630e832 SHA-1: eec64bba3adc1edb8321434750da926a3bc7b446 SHA-256: b2220554868164f995199c15b2703db2946a16dffcfe990ec0ce13526736fcb1
136 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, as malicious. It contains an embedded URI and an SEO redirector link pointing to 'https://maypoin.ru/123?utm_term=let+my+love+open+the+door+the+voice', indicating a phishing or malware distribution attempt. The document body is heavily obfuscated, but the presence of external links suggests it's designed to redirect users to malicious sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://maypoin.ru/123?utm_term=let+my+love+open+the+door+the+voice PDF link annotation
    • https://cdn.sqhk.co/bovokolel/WQhH3B0/59371736055.pdfIn PDF document text
    • https://cdn.sqhk.co/gukawaki/hdhhYPI/pirates_of_galaxy_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezima/gdhhjdY/management_skills_books.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/aLZhak3/gixomojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366964/normal_5f87fe624dc3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460457/normal_5fc004d946410.pdfIn PDF document text
    • https://cdn.sqhk.co/tozegatopaxu/ghjjAgg/township_of_washington_nj_homes_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/BVhgicy/liverpool_wallpaper_2020_champions.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/eL2J3ib/31062978695.pdfIn PDF document text
    • https://cdn.sqhk.co/gisatajofo/ajKjcfM/wufufazagew.pdfIn PDF document text
    • https://cdn.sqhk.co/lomokubaf/pIKjdge/sojiket.pdfIn PDF document text
    • https://cdn.sqhk.co/kewesowovim/jbgiF1k/robot_jump_over_hurdles_in_track.pdfIn PDF document text
    • https://cdn.sqhk.co/kagumuzom/KSLB4gj/37276768340.pdfIn PDF document text
    • https://cdn.sqhk.co/dopuwene/rm5G4jd/ragivulavap.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/OibiaGo/4851389031.pdfIn PDF document text
    • https://cdn.sqhk.co/titubebojek/ejeYPY2/2196561531.pdfIn PDF document text
    • https://cdn.sqhk.co/kojupiloxifi/6qVKBig/cotswold_water_park_picnic_sites.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_5f912e087dd1e.pdfIn PDF document text
    • http://kefipipina.22web.org/audyssey_acm1hb_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuwotatikiluwa.epizy.com/roresatejumunuzezi.pdfIn PDF document text
    • http://zomimek.epizy.com/assassination_rogue_pvp_guide_8._1.pdfIn PDF document text
    • http://gagonunanu.epizy.com/haskell_stack_template.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_off0000dfb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB5 5028 bytes
SHA-256: a6b5ae0a7a34826321a394ecc860156a60f0fad700c439459b69de7ff520dfa8
font_01_sfnt_off0000f0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B6 10884 bytes
SHA-256: dfd591b45926b16d7f800e45438bceb783b47d4fa3e9f3040c421b4f3f60ded9