Malicious PDF — malware analysis report

Static analysis result for SHA-256 d77a49538c9e1ca1…

MALICIOUS

PDF

70.7 KB Created: 2021-03-31 19:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 254d0a28d75194b8ea26805bfea867bf SHA-1: a8f9e61e88a2baf09eca60b8d19855580af85fd3 SHA-256: d77a49538c9e1ca197643f405edbe4546c20a5d406aede49db5179af07419608
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. The file contains a large number of external links, forming a link farm, with one prominent URL being https://nipisod.ru/wix?keyword=relion+wrist+blood+pressure+monitor+instructions+bp3uw1-3erl. The PDF structure and the presence of numerous external links suggest an attempt to manipulate search engine results or redirect users to potentially malicious content.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/wix?keyword=relion+wrist+blood+pressure+monitor+instructions+bp3uw1-3erl PDF link annotation
    • https://xitonodulamet.weebly.com/uploads/1/3/4/3/134307836/2308318.pdfIn PDF document text
    • http://kubosikavudux.mygamesonline.org/66998822213.pdfIn PDF document text
    • https://rarinuda.weebly.com/uploads/1/3/5/3/135349313/tadebizelabejesi.pdfIn PDF document text
    • http://zarewubizeno.mywebcommunity.org/computer_science_and_information_technology_book.pdfIn PDF document text
    • http://dupamineni.medianewsonline.com/epidemic_endemic_pandemic.pdfIn PDF document text
    • http://rewetuxavix.mypressonline.com/julibux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/xerox_workcentre_7845_change_admin_password.pdfIn PDF document text
    • http://tikimiwuwal.myartsonline.com/dusebavikopikoboziwetuj.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/44402964539.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/38870372997.pdfIn PDF document text
    • http://gijafan.epizy.com/comparing_fractions_with_unlike_denominators_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/90711779861.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/what_type_of_cell_reference_is_c19_group_of_answer_choices.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/re_zero_light_novel_9.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/48996336195.pdfIn PDF document text
    • http://zasuwunal.myartsonline.com/what_charities_will_pick_up_used_furniture.pdfIn PDF document text
    • http://suzifoki.myartsonline.com/marketing_digital_que_se_estudia.pdfIn PDF document text
    • http://bumejefivoxigo.myartsonline.com/zogilaxugakeziwilezajewu.pdfIn PDF document text
    • http://revudipepofaten.myartsonline.com/39208160654.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/bigasoft_converter_free.pdfIn PDF document text
    • http://gakinodimojulat.rf.gd/pride_and_prejudice_2005_full_movie_online_free_no_download.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_off0000d4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B3 5496 bytes
SHA-256: 8ea2c4b5e8a55c1d1ac02ec1909e501a5df2a855de6b6ce9afddcd54152db952
font_01_sfnt_off0000e76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76B 11216 bytes
SHA-256: d92687c4bdb8fcc11845cdff0cbeab3708b6de1138ee7b3929c53d64af2a872f

Open this report in the interactive analyzer, or submit your own file for analysis.