Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f216588a2a076bf…

MALICIOUS

PDF

80.6 KB Created: 2021-03-28 21:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d3aea35c44a765f95948311aab8262ec SHA-1: 51eb67aec9eba72705dcb7b2d89049377661df86 SHA-256: 5f216588a2a076bf63858f9f657dedd9bcf8125beb28bcfb631b3261228d1eb1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical finding for a mass external PDF link farm and a ClamAV detection for Pdf.Phishing.Trojan. The document body, though heavily obfuscated, contains references to 'adhd treatment guidelines australia' and appears to be generated by wkhtmltopdf, suggesting a lure for users seeking information. The presence of numerous external links, many pointing to other PDFs, indicates a likely attempt to distribute malware or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/123?utm_term=adhd+treatment+guidelines+australia PDF link annotation
    • https://cdn.sqhk.co/jojikoxazew/yDJhhib/37777782122.pdfIn PDF document text
    • https://takixesa.weebly.com/uploads/1/3/4/6/134621412/jajom.pdfIn PDF document text
    • https://dedisamowigegij.weebly.com/uploads/1/3/4/4/134472492/9005d498298.pdfIn PDF document text
    • https://cdn.sqhk.co/bizewavaxug/x8heuwY/reflections_of_shapes_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/rotonoba/Z2M8jd0/gebobapajinirinopetetiw.pdfIn PDF document text
    • https://cdn.sqhk.co/rajunakeb/hiegc84/my_city_island_mod_apk.pdfIn PDF document text
    • https://bepirujeli.weebly.com/uploads/1/3/1/8/131856565/5565399.pdfIn PDF document text
    • https://mofegagopabelem.weebly.com/uploads/1/3/1/4/131438130/jimewepop_davizogopogax_zateb_barez.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/ghrgcua/designer_city_building_game_download.pdfIn PDF document text
    • https://wekexodaxax.weebly.com/uploads/1/3/4/7/134713384/7697144.pdfIn PDF document text
    • https://zatenumidepav.weebly.com/uploads/1/3/0/7/130776458/kupilalivesi.pdfIn PDF document text
    • https://visimekariluvog.weebly.com/uploads/1/3/1/4/131483525/periwixusinabonuzel.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://s3.amazonaws.com/bifadiwuwileji/lagepuvemamonor.pdfIn PDF document text
    • https://e40da922-b0e4-44be-9878-2d4898ccab21.filesusr.com/ugd/3a38e0_fa61b0734a464c0e9271440ce2e1f90c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/jinja2_template_variable_scope.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/wulebejebezat.pdfIn PDF document text
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_8619a1d8c1d24deb98ea64a1ddc17d2a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/jquery_css_selectors_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/kosenomaluzerikamejud.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/bufudumafowaw.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/linear_regression_calculator_worksheet_2._5.pdfIn PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_02a2ace3422446698cbea3b647f31372.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fifomi/trumpet_voluntary_music_sheet.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_off0000f213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF213 5000 bytes
SHA-256: d554287e7810c60619ab8bb324af68813d404102e171310bfbf1f839872134f9
font_01_sfnt_off000102e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E0 10404 bytes
SHA-256: 5b3b3cd31a866d8518d9120656412a2ae113e3d8885bbcd2b83ede0b37b3c577
font_02_sfnt_off0001266c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1266C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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