Malicious PDF — malware analysis report

Static analysis result for SHA-256 40699d6fde9c5494…

MALICIOUS

PDF

81.2 KB Created: 2021-09-20 10:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d0a8214cdf418324eda8baeafcb4c9ae SHA-1: e1f1b2c9dc15ed5e904a383f6c378aef6d9cad3e SHA-256: 40699d6fde9c5494b43303bbfbfe77d565f9863d569f44d182fb6b304cd40e82
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The heuristic firings indicate the presence of external URIs and a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://dom4m.by/userfiles/files/ledusovuxojipakinuribo.pdf In PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16143de199155f---pagepedasaladovuboj.pdfIn PDF document text
    • http://sdds.be/userfiles/file/40881334425.pdfIn PDF document text
    • https://euforbiabulgaria.com/uploads/pages/files/sutizi.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/povosuvozadurusorulubot.pdfIn PDF document text
    • http://cheumst.com/upload/fckeditor/file/90754188244.pdfIn PDF document text
    • http://mmbassisiprovince.in/files/js/ckfinder/userfiles/files/90591167062.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/66356411039.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/42408202795.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/49qiq4mnb2ia96obp7dlt2att1/todez.pdfIn PDF document text
    • http://stimatacasa.eu/userfiles/files/xagobijavofazejutixivote.pdfIn PDF document text
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/budegojepemerolomoga.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/78077221747.pdfIn PDF document text
    • http://lonerangerfanclub.com/ckfinder/userfiles/files/99025974169.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/12642216457.pdfIn PDF document text
    • http://czerwoneiczarne.pl/files/file/vitesomenexepafup.pdfIn PDF document text
    • http://bjxbw.cn/userfiles/file/68083171178.pdfIn PDF document text
    • https://parisnordmedical.fr/docs/file/45528140083.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/71443919639.pdfIn PDF document text
    • https://tigapilar.com/upload/files/mexupuwapijon.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/niselavajanivarexo.pdfIn PDF document text
    • https://photofetimages.com/gawoduso.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/manafelenemi.pdfIn PDF document text
    • http://shop-cartuning.pl/userfiles/file/76893497015.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=no+limit+drag+racing+hackPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD976 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF188 18048 bytes
SHA-256: fd875dac5dbd17b7c8d67eb847faf133a4f6ecf27791d3346c6dfdc55a0e0f95
font_02_sfnt_off0001200b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200B 10588 bytes
SHA-256: 24d936b6a671202d026134eb1ccfedbf4400066f917a4ba39279143056410fdf

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