Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af1e197d076aa99…

MALICIOUS

PDF

71.3 KB Created: 2021-03-15 16:29:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d830a7a4faa8d8b103bd9454deca8ae SHA-1: b0ccee2e5b9540ecc4d986af33aeb04f8cfa2628 SHA-256: 6af1e197d076aa99b976eb8d4a76ea98915d91af6468f1b07fddb30cb5536e9a
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, with the primary URL being `https://botokaw.ru/wix?keyword=baby+trend+sit+n+stand+lx`, suggesting a link farm or redirection scheme. The presence of numerous PDF links, as detected by the PDF_SEO_LINK_FARM heuristic, further supports the attack pattern of luring users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=baby+trend+sit+n+stand+lx
    • http://dobilarujokux.sportsontheweb.net/gujivetimi.pdf
    • http://wivaserana.mywebcommunity.org/what_are_some_examples_of_contrast_media_reactions.pdf
    • https://jobuvurivoko.weebly.com/uploads/1/3/2/6/132681743/xemezume.pdf
    • http://dusejetiwogodad.getenjoyment.net/penny_stocks_to_watch_motley_fool.pdf
    • https://fetezubusob.weebly.com/uploads/1/3/2/6/132681625/tomagilaxurinak-bavered-zazozowizu.pdf
    • https://negowuvezesat.weebly.com/uploads/1/3/4/8/134859399/voruxevugikusobi.pdf
    • https://nuravodabola.weebly.com/uploads/1/3/0/7/130740537/nifosilopo.pdf
    • https://mojogobiwed.weebly.com/uploads/1/3/4/7/134747953/jolejogadute-dobipapim-tawav.pdf
    • https://fotikelotoni.weebly.com/uploads/1/3/4/6/134684504/kisalize-kuruxon.pdf
    • https://mebifexet.weebly.com/uploads/1/3/1/3/131381374/fokuw-zafapewuxav-sanewuwib-temudux.pdf
    • https://zuzesewijolane.weebly.com/uploads/1/3/1/4/131406438/3814468.pdf
    • https://naxovemunozi.weebly.com/uploads/1/3/5/9/135958864/rudowitoj_gogejolizikom_mivoxiv.pdf
    • https://sebumeganajili.weebly.com/uploads/1/3/0/8/130874272/zaxafonokobaromut.pdf
    • https://zepitobazelaki.weebly.com/uploads/1/3/4/6/134619491/nosojoro_guvutevu.pdf
    • https://silukirajewulo.weebly.com/uploads/1/3/2/6/132695932/xobedibiwe-derules-sudonajapeb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://satawakerexe.atwebpages.com/17879629557.pdf
    • https://uploads.strikinglycdn.com/files/1cd9cd53-7e8c-4a5d-8950-9d9739c665e4/koxiwesiz.pdf
    • https://uploads.strikinglycdn.com/files/19b988ad-a866-48bf-81ad-a6eda161a8f5/23552197446.pdf
    • https://uploads.strikinglycdn.com/files/1ce721ad-ec54-4298-94ac-a2aeb971faa5/does_james_allen_sell_lab_created_diamonds.pdf
    • https://uploads.strikinglycdn.com/files/10358b7e-f7d6-443c-9773-50a7ea288988/towawi.pdf
    • https://uploads.strikinglycdn.com/files/73d28ef4-e143-4ca2-aae5-6079ffc38640/dog_man_fetch_22_read_aloud_part_3.pdf
    • https://uploads.strikinglycdn.com/files/bafda6bc-098b-40f6-bf50-2989ce1d58ae/taurus_pt111_millennium_pro_g2_for_sale.pdf
    • https://uploads.strikinglycdn.com/files/ff88de56-8243-45c5-8693-6d89755fbdef/excel_vba_find_string_in_range_of_cells.pdf
    • http://kepofif.onlinewebshop.net/livre_grammaire_et_orthographe.pdf
    • https://uploads.strikinglycdn.com/files/648c2c12-806e-4530-9b97-de8b0b11e857/relative_clauses_worksheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da02.bin
b74b39cbbbf24020c5736598aaceb5ef12ba5b41f979a26a0e56c2c52426e07b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA02 5180 bytes
font_01_sfnt_off0000ebae.bin
68528be0ccd28eb0a7efd30c58710e47d2adacd7e694f3ef809c06eb27c2b89c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAE 10504 bytes

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