Malicious PDF — malware analysis report

Static analysis result for SHA-256 c599021111884af9…

MALICIOUS

PDF

88.2 KB Created: 2021-03-20 15:08:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2767c6ca2c9cd73fe7aaf95001d63b7e SHA-1: 03a991d41b72f6ade6245de5688346835c9b812d SHA-256: c599021111884af91d7dc403493b682007547ac090fa704998482b1afdc6f7af
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful sites.

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
  • 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://maypoin.ru/123?utm_term=formosan+aboriginal+culture+village PDF link annotation
    • http://worabipupe.mypressonline.com/what_does_a_river_runs_through_it_mean.pdfIn PDF document text
    • http://sokfresh.fun/how_to_turn_a_bedsheet_into_a_togazjudx.pdfIn PDF document text
    • http://itnegozio.info/122147404424bpzx.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/jWhgjf2/wukurewoweliduke.pdfIn PDF document text
    • http://tuxesimufimiti.mypressonline.com/arthurian_romances_chretien_de_troyes.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/jSSLjih/kung_fu_fight_scenes_best.pdfIn PDF document text
    • http://netusikofigo.22web.org/vebimavenazulakumoresut.pdfIn PDF document text
    • http://apelsins.space/modern_day_plague_sars8a62t.pdfIn PDF document text
    • http://dubesapuxi.22web.org/interview_questions_and_answers_for_managers.pdfIn PDF document text
    • https://cdn.sqhk.co/noremixujor/cgheidI/vuvigivakapadunonarojurus.pdfIn PDF document text
    • https://cdn.sqhk.co/satukevaguka/fWii7ii/swordigo_wastelands_strange_place.pdfIn PDF document text
    • http://vaxisezawoged.scienceontheweb.net/michael_vey_movie_where_to_watch.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fabevax.myartsonline.com/bible_concordance_online_esv.pdfIn PDF document text
    • https://35b1a599-9f45-4897-82ce-59a931fc5495.filesusr.com/ugd/daca0d_c5a57d5029cb4150ba60c30b942e5c18.pdf?index=trueIn PDF document text
    • https://6baea7ca-81e4-4a11-8410-716433a99462.filesusr.com/ugd/764aaa_bc163d7e59b74a2c9fa3bc646e820322.pdf?index=trueIn PDF document text
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_0f12f74669b94873a86bb3ec8085f786.pdf?index=trueIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/7955315954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b4ff6ac-f5fd-4681-9f8f-eb324cf66f01/what_is_the_sum_of_infinite_geometric_series_3_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad45e7d6-f261-4452-a25a-6c14b6fe8146/96371683840.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5bef90f-ca21-423b-ac79-e716046111aa/lubidelunuremapoduvazenod.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000ed8f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xED8F 13960 bytes
SHA-256: 9f1542dd82e99ee11df3c70ceac3886e5764e6cc3854d69ddf9b73992d47fb7f
font_01_sfnt_off00011a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1D 5272 bytes
SHA-256: ddd5600626ca1db06fd1be175c5795ef1e49838017869ae1824e9fcd88b2bf97
font_02_sfnt_off00012c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C05 11904 bytes
SHA-256: ae45195cea7860d3675abbbc7284a47f2c2cb657970f4c3bda8ee533ba5bb73f

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