Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1373e11a40b85d2…

MALICIOUS

PDF

77.8 KB Created: 2021-03-06 15:45:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 7e666a3edf3d79e273a15d13045d5c7a SHA-1: 27a957d96936a85a3554b3551214ceedad2cdaf5 SHA-256: f1373e11a40b85d216a204115ddbedc5050fd4c5ff14cded9fabca26576afdaa
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The document body, though heavily obfuscated, contains text related to 'Jesuits oath of office' and the authoring application 'wkhtmltopdf', suggesting a deceptive pretext. Numerous embedded URLs point to external websites, with at least one identified as a link farm on disposable hosting, increasing the likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/aws?utm_term=jesuits+oath+of+office PDF link annotation
    • https://pusudojajepi.weebly.com/uploads/1/3/5/3/135322366/gekilaja-bemozepovuvidoj.pdfIn PDF document text
    • http://nasty666.space/por_que_o_ingls__considerado_a_lngua_francalbrra.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/jigobuzatodikivesaj.pdfIn PDF document text
    • http://verekozugotised.22web.org/robidokugu.pdfIn PDF document text
    • http://zeboxagekej.sportsontheweb.net/do_hepa_filters_work_on_covid.pdfIn PDF document text
    • http://shoop-fh.ru/hashar_2008_full_punjabi_movielq6wi.pdfIn PDF document text
    • http://sq11mini.com/budget_approval_form_templatedxs4o.pdfIn PDF document text
    • https://mebedepubini.weebly.com/uploads/1/3/0/8/130813558/6145337.pdfIn PDF document text
    • http://dress-russia.ru/aggro_rogue_uldum_guidelna85.pdfIn PDF document text
    • https://xipuruvu.weebly.com/uploads/1/3/4/6/134654852/9976079.pdfIn PDF document text
    • https://xoxekoxezugox.weebly.com/uploads/1/3/0/7/130738790/b77895e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lipepojofutuxuf.epizy.com/30727804671.pdfIn PDF document text
    • http://wikotutagor.epizy.com/71305421106.pdfIn PDF document text
    • http://gumomexad.onlinewebshop.net/how_to_connect_my_swann_camera_to_my_phone.pdfIn PDF document text
    • http://gezexibubaju.rf.gd/sqlrpgle_free_format_examples.pdfIn PDF document text
    • http://kefujuvaw.epizy.com/lewaz.pdfIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/ar_15_sling_for_hunting.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/1461373514.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/ar_15_operation_animation.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/tusanikoburukovajuda.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/go_tell_it_on_the_mountain_novel_summary.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_off0000f56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56A 4828 bytes
SHA-256: 974ebfd13175984ff9e859518d56243ea639ff6f7061f34de554c30544f53f04
font_01_sfnt_off000105dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DC 10696 bytes
SHA-256: 7bd7ed459b5a9c557510aed4017fbb443633146acb13c6b4beabf9129b687443

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