Malicious PDF — malware analysis report

Static analysis result for SHA-256 80835551b63f143b…

MALICIOUS

PDF

85.5 KB Created: 2021-04-10 00:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 827ff271fed658392725c679990107ac SHA-1: bb7985a3183a86a9c3b31a0ef09de764d52bf751 SHA-256: 80835551b63f143baae25c73d9b14a26059b2c3bbf4cd167ee4e6c2265684b23
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. The primary malicious URL identified is 'https://dugedepap.ru/strik?utm_term=did+tesla+create+the+first+electric+car', which is likely used to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://dugedepap.ru/strik?utm_term=did+tesla+create+the+first+electric+car PDF link annotation
    • https://cdn.sqhk.co/simikitivo/vIq7phi/top_10_zombie_apocalypse_survival_tips.pdfIn PDF document text
    • https://cdn.sqhk.co/jememobak/ebgghh1/4795838322.pdfIn PDF document text
    • https://cdn.sqhk.co/wujamufaw/h6hidia/balenciaga_triple_s_sneakers_pink.pdfIn PDF document text
    • https://cdn.sqhk.co/ponajadu/hhhjbji/jatudi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_1ffae03adb3b4462b1d4281c6cedc5ad.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ada8c4bd-8a4b-4bed-b8a9-221ebf9f6ce4/55366022796.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/tiragiposepojifarudan.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/fuxazijededadopinatesula.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/man_who_built_the_moon_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5820e055-2cff-4426-97c9-146ec1f6f498/pezupujibewobopidovup.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/resumen_de_la_pelicula_el_mundo_de_sofia.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/jematutufejuv.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/how_to_log_into_your_icloud_storage.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/uk_h_s_sentencing_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10484d6e-fdf6-48b4-a889-767b89b0abda/the_lady_or_the_tiger_literary_analysis.pdfIn PDF document text
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_5584ebd306b54caa9c97ddcfebc29683.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sorogamat/bahubali_1_full_movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53c98a88-f9c4-4c17-b916-af154972ed88/questions_to_ask_when_buying_a_small_business_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/19372038592.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/what_is_the_best_jump_rope_for_working_out.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/cadre_photo_tres_grand_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1497d59-5ac5-4716-bbbf-cbcdfea0e369/28077817200.pdfIn PDF document text
    • https://c8d0f166-86fd-441b-8df5-aa5e6c6c7644.filesusr.com/ugd/f4b3af_283868b5369b42358078cbe1284597bf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/dakafisuxanoxukatusixi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B8 4680 bytes
SHA-256: 92e351a900b65f655046ef1ceafed657d6f634c050083e6dc4273a0323840c2d
font_01_sfnt_off000114ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AB 10916 bytes
SHA-256: 89523670a69e6b4b4d5c0400f5042f597da1de2592d9d04dfbc43540341da306
font_02_sfnt_off000139cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139CD 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230