Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a5683954dc077de…

MALICIOUS

PDF

84.6 KB Created: 2021-06-03 07:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5ce3af48de61d8f9c601006cb60f178b SHA-1: 35c44a450ffb8655ebfebd0656ecb26b3ab5d612 SHA-256: 0a5683954dc077dea262e3177b87d75a19c815755ac1ddaedd5c29664aea1cd6
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'jottigo.ru', which is likely used to host or redirect to malicious content. The PDF's structure and the presence of external URIs suggest an attempt to trick users into visiting a malicious site, potentially for phishing or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jottigo.ru/123?utm_term=chamelephon+apk+2016 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464861/normal_60070dab00d3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451208/normal_5fff3bbfe9f79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383922/normal_6028b1c409718.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465133/normal_603ab54059ef0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486363/normal_5ffdc5053b137.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425768/normal_6030260ea3f18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_604394305c3ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/18c643ed-7c96-4a08-b4dd-38f963164e85/new_hd_bollywood_movies_khatrimaza_300mb.pdfIn PDF document text
    • http://zogekinovag.pbworks.com/f/english_speaking_practice_topics.pdfIn PDF document text
    • http://jajafad.pbworks.com/w/file/fetch/144417279/idle_streamer_mod_apk_ios.pdfIn PDF document text
    • http://nebapelamive.pbworks.com/f/75603670445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75ae01cb-5a24-4ca7-b65c-873eaef281f3/eysenck_personality_questionnaire_revised.pdfIn PDF document text
    • http://rugewenuzed.pbworks.com/w/file/fetch/144423456/88044860200.pdfIn PDF document text
    • http://zupelapowi.pbworks.com/f/how_to_resign_on_jcpenney_kiosk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7695e27-3afb-467e-b604-1e1af9a9dfd5/html_and_css_course.pdfIn PDF document text
    • http://sutodoromar.pbworks.com/f/65238852398.pdfIn PDF document text
    • http://lufokomarib.pbworks.com/f/algebra_and_trigonometry_james_stewart_solutions.pdfIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144420828/planeta_dos_macacos_o_confronto_assistir_online.pdfIn PDF document text
    • http://palixazoke.pbworks.com/f/mba_cet_2015_question_papers_with_answers.pdfIn PDF document text
    • http://nolumemonip.pbworks.com/f/la_fuerza_de_sheccid_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d10589a-193f-4d78-ae7c-454ae80929f0/32732937949.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/f/59991445059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7be8482c-e274-471f-9de5-fe8f295ee696/nusumelinomomudix.pdfIn PDF document text
    • http://xelivolofuso.pbworks.com/f/36017553811.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_off00010a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A63 5232 bytes
SHA-256: 9e2006adeea8d487b1cb9369480236ea3e357b4e019a3f3e2d667cccf695afde
font_01_sfnt_off00011c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0C 12000 bytes
SHA-256: ad19ac638745b33a6d5ad0ba05d35b7f9bf65e21897560b530fef85488eaa4a3