Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e20bdb33ba8e2cf…

MALICIOUS

PDF

74.6 KB Created: 2021-02-16 02:00:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5812c922f952b29dc9cdb672857d6922 SHA-1: 77d6717081365f374c9f7700a16522fbe4f2a538 SHA-256: 0e20bdb33ba8e2cf325e0487e5e4aa4e0c6933c104dc90d4f72179f85a864de0
224 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to disposable domains and redirector infrastructure, indicating a link farm designed to obscure malicious destinations. Heuristics indicate these links are used as lures, with some pointing to known malicious redirectors. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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.
  • 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://yafferge.ru/strik?utm_term=stihl+fs+90+parts+list In PDF document text
    • http://zadidibupinumav.22web.org/how_to_get_free_rp_in_league_of_legends_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/zowegifivufo/rcbghjc/outdoor_pottery_class_los_angeles.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377115/normal_5fc7b97e03fc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498983/normal_602ae71d1c11c.pdfIn PDF document text
    • https://cdn.sqhk.co/jawubibegeba/bggjcge/92400279856.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476274/normal_5ffe0b579046f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482860/normal_5fef6d20033b3.pdfIn PDF document text
    • https://cdn.sqhk.co/rufadexu/gjHiiWR/71042326100.pdfIn PDF document text
    • http://tertov.xyz/781451207946u6wq.pdfIn PDF document text
    • http://gprofights.ru/xegazigipuxa7gzqu.pdfIn PDF document text
    • http://lnstagram-support.live/rules_for_adding_ing_to_verbs_worksheet8bnek.pdfIn PDF document text
    • https://cdn.sqhk.co/kigowabalo/jgjc6b4/banotifaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wigazimo.epizy.com/chamatkar_full_movie_filmywap._com.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/bogifasof.pdfIn PDF document text
    • http://mosararivifu.rf.gd/candy_crush_saga_for_mac.pdfIn PDF document text
    • http://jizuperuxe.epizy.com/rom_xiaomi._eu_mido.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/bahubali_2_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/gnomeregan_vanilla_map_guide.pdfIn PDF document text
    • http://gaditimotef.rf.gd/bajrangbali_dj_songs_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/zubirusiz.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_off0000e767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE767 5388 bytes
SHA-256: 80bff502a197e173a24c8b5c40414842a61afb7f7e9ac377c5705e51bd06f1ab
font_01_sfnt_off0000f9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B0 10408 bytes
SHA-256: c6d61d7b9762b16801edc48df3e960b9175cfae28d1a94a109cabdedc037f971

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