Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6a69a607b2c4b11…

MALICIOUS

PDF

81.6 KB Created: 2021-03-14 02:49:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8ed864d8a982785a42819d49d13f69e7 SHA-1: 5968cea3e2b55c7a8b62519b3c3085633e619d97 SHA-256: f6a69a607b2c4b114ae5277ce7bf90d07888c8a395775128cdfbe4c09494f569
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a malicious document designed to trick users into visiting harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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
  • 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.
  • 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://zajinet.ru/strik?utm_term=attachment+style+questionnaire+bartholomew PDF link annotation
    • http://lexaxak.mywebcommunity.org/kindle_d01100_battery_price.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496826/normal_5fe26fd9396f1.pdfIn PDF document text
    • http://pobesegu.scienceontheweb.net/givovozukaronawunegaruxu.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/oqMghge/cool_manly_wallpapers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477635/normal_5fccc0a81e55d.pdfIn PDF document text
    • http://didavixakodix.22web.org/fosonanezulojebomir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365620/normal_5fc9771c8166a.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/kAifohf/kowiwibopazisit.pdfIn PDF document text
    • http://davilebut.66ghz.com/couple_images_with_quotes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470532/normal_60263338a3abf.pdfIn PDF document text
    • https://cdn.sqhk.co/ribegibonot/4p1TXhh/app_bri_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/rodofusavivi/apipdam/cat_ears_and_tail.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410204/normal_6002c9e27f7ef.pdfIn PDF document text
    • https://cdn.sqhk.co/jaguwubax/iahicVk/idle_car_clicker_game_apk.pdfIn PDF document text
    • http://gagimubu.mywebcommunity.org/jedesajasakalur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://murarefap.epizy.com/how_to_remove_a_brinks_alarm_system.pdfIn PDF document text
    • https://3b1a0cff-dc54-4917-88c1-cdf904a8db56.filesusr.com/ugd/60aab8_966acb0eb9714ff1839eff375d2cdb4f.pdf?index=trueIn PDF document text
    • http://soxuxemakim.rf.gd/muxogenepijevovujokem.pdfIn PDF document text
    • http://zokidogonaz.rf.gd/baarish_song_flute_ringtone.pdfIn PDF document text
    • http://wipapirub.epizy.com/rizoramawebotezunidik.pdfIn PDF document text
    • http://xewenofos.epizy.com/iready_answers_level_e.pdfIn PDF document text
    • http://titarejidawe.epizy.com/autoenginuity_software_free.pdfIn PDF document text
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_daf3a49e06524a899a3439bba67660af.pdf?index=trueIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/troy_bilt_walk_behind_string_trimmer_parts.pdfIn PDF document text
    • http://pumusejori.epizy.com/8609921003.pdfIn PDF document text
    • https://09d56968-2ae9-412d-ad86-e67dc63a1c23.filesusr.com/ugd/e8b91f_7200ff69eb144b5591abd9ccdf9f992b.pdf?index=trueIn 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_off0001015b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015B 5488 bytes
SHA-256: 75348219d5facb85eae8c41ecddeb45ab82e9c61bb711e84d3206779ef67d56d
font_01_sfnt_off000113f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F6 10768 bytes
SHA-256: 81e97aaa5bec3076fba5a9f13044d0c31e2dac0188e1ceb8e22eefae592e9447