Malicious PDF — malware analysis report

Static analysis result for SHA-256 01dab85ac87448f0…

MALICIOUS

PDF

97.9 KB Created: 2021-03-24 16:06:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 108dc0ece47475c0bb443c841befa608 SHA-1: 8e30119d8350493087f93b5e0786cd41c36c7ba7 SHA-256: 01dab85ac87448f09597d8c13718a3b456dfa8b8a905dbf308dfd0cd559b0d7e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with at least one identified as a link farm hosted on disposable infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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://ponafet.ru/award?keyword=autoecologia+definicion+pdf PDF link annotation
    • https://cdn.sqhk.co/venitalobeni/gjjjjeO/28017569175.pdfIn PDF document text
    • http://buvemalo.66ghz.com/63360193880.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/mjigeQ1/call_of_duty_warzone_download_for_android_free.pdfIn PDF document text
    • http://witikotuxigere.scienceontheweb.net/manual_autocad_electrical_2020_espaol.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwasokeg/nigPje5/suvorowujuvuwudida.pdfIn PDF document text
    • http://jelenus.iblogger.org/pudekugulupate.pdfIn PDF document text
    • https://cdn.sqhk.co/kejofuvata/ftieAig/64145863920.pdfIn PDF document text
    • http://pakawuwujawo.getenjoyment.net/reasons_to_stay_alive_sample.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://fabowifomewod.epizy.com/aankhen_1993_full_movie_free_mp4.pdfIn PDF document text
    • http://lajuvinujako.rf.gd/moped_repair_orange_county.pdfIn PDF document text
    • http://xopozajuve.epizy.com/golden_guide_hallucinogenic_plants.pdfIn PDF document text
    • https://8c285b57-3156-47ce-881b-df665acc117b.filesusr.com/ugd/8d46c2_d7d10751768949e3b2a0b3742a250eb1.pdf?index=trueIn PDF document text
    • http://simitilukurisat.rf.gd/lexafijasokigusutot.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/book_free_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/adobe_acrobat_pro_11._0.pdfIn PDF document text
    • http://dorofudi.epizy.com/65746098686.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/arbeitszeitgesetz_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/game_dev_tycoon_ios_guide_2018.pdfIn PDF document text
    • https://d80868e2-5d34-4dda-9345-0396294a35aa.filesusr.com/ugd/f9fac6_8dcf388c6415431bb5036277464d1f6d.pdf?index=trueIn PDF document text
    • http://palelezugob.onlinewebshop.net/11338643249.pdfIn PDF document text
    • http://tamemesile.rf.gd/blank_tabloid_newspaper_template.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/duwitufarukofaxod.pdfIn PDF document text
    • https://2386e270-bd20-42c1-b3e5-1ba7eaa1d68d.filesusr.com/ugd/b4f0c6_65fcec18db28496d89f03db3a815a2b1.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10859 3948 bytes
SHA-256: 505d22bc5d5c8d575acf981d7ec56401cfbc031fea6a0a3ee15e3753f6517301
font_01_sfnt_off00011667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11667 5036 bytes
SHA-256: 06f931b7131013c77172919e705415ceb8c2dc58c7233c2556f88cd8367ec987
font_02_sfnt_off000127a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A6 5744 bytes
SHA-256: 4432df48a5a972be7bd9ea8e9fe66a3b28a2891f8e17eb6b987ff92cb7678255
font_03_sfnt_off00013a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A27 11684 bytes
SHA-256: 9cf520436691588ff33185147c679506b04d09fa756e380db9b6986e6484580f
font_04_sfnt_off00016048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16048 16792 bytes
SHA-256: 987bb493a88c7eb78ed3ab92eddbeeed20389f00d11306ff94d3fce465bfc1ba