Malicious PDF — malware analysis report

Static analysis result for SHA-256 93fb199f2884e12e…

MALICIOUS

PDF

78.7 KB Created: 2021-04-03 10:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 758f09c06fbc906d57a737b8ff751b3a SHA-1: 770fa057c5dad480190e2f0b64b38a9873af8917 SHA-256: 93fb199f2884e12eac5b979eb8d2af02ab3f968ad5696c9f91be05c70eddecf4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable domains and exhibiting link farm characteristics, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment designed to redirect users to potentially harmful content.

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://soxebez.ru/strik?utm_term=star+trek+beyond+jaylah+race PDF link annotation
    • http://shtancircul.site/luvebijevuxuzodurerilownpr2f.pdfIn PDF document text
    • http://pubavamamuzagur.iblogger.org/45945344260.pdfIn PDF document text
    • http://rokuboxajiga.medianewsonline.com/what_is_e2_code_on_pellet_stove.pdfIn PDF document text
    • http://misstourist.info/vilezaqgzjw.pdfIn PDF document text
    • http://instapriz.website/14099343360b0ywc.pdfIn PDF document text
    • http://lightstart.xyz/is_1800_psi_good_for_a_pressure_washerdrcug.pdfIn PDF document text
    • http://sinoniwim.22web.org/why_did_arthur_die_merlin.pdfIn PDF document text
    • http://atomyimperial.ru/banana_milkshake_recipe_with_vanilla_ice_creamrznrd.pdfIn PDF document text
    • http://gelupulofevabek.medianewsonline.com/kinikavaramidimugige.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/ff685915-bb52-4410-8b98-d72e0e72ca97/turogemumurumekake.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/prakash_ambedkar_video_song.pdfIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_1f8375e4a9724d9a9c79fa5737727a6a.pdf?index=trueIn PDF document text
    • https://3cd6846c-369c-4875-9c63-132df726a2dd.filesusr.com/ugd/7ab50f_667f1e8c2e8a4537aded0035be509599.pdf?index=trueIn PDF document text
    • https://2178e3ec-2e0a-46e0-af35-d8a6fdfeb21a.filesusr.com/ugd/c411cf_2dc60a116ccd4fdf820c913d7e0145d7.pdf?index=trueIn PDF document text
    • https://91e55214-10ad-44cf-a10a-60a9392df58b.filesusr.com/ugd/e1c37d_4a681adbcf694761bfd1161b5596da69.pdf?index=trueIn PDF document text
    • http://botawaxugeb.epizy.com/how_do_i_change_the_size_of_a_dymo_label.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/47065394105.pdfIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_dc4a87d33b204268aab1790291ebddc2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd998c47-f465-41e3-94fc-2b902d9d5b3b/what_does_fp_mean_on_a_license_plate.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/wpf_templatebinding_default_value.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dc61780-370c-4fe1-85e6-cde6f6518792/13515400228.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/41459650329.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_off0000f443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF443 5336 bytes
SHA-256: f2bec49294d431736044826e30477431d4443b99e2935b76d8137d43dd52bb80
font_01_sfnt_off0001066e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066E 11652 bytes
SHA-256: 3ac3a625fa64d04483948d5b517e311c9e89b56adb12eea8ff752111a61ada1f

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