Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d405ca5a1e0db40…

MALICIOUS

PDF

94.6 KB Created: 2021-09-17 00:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: f07f16b0a4141dff8bf25bcabc04cf18 SHA-1: a1a5f296096833d1c9a55af13ccb55a3e1b48a15 SHA-256: 0d405ca5a1e0db40cd44c3e0dab412c8071ce664bf87c1b54f7dca77239f23b2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm. The presence of these links suggests an attempt to direct users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 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.
  • 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://bimore.vn/webroot/img/files/23030048486.pdf In PDF document text
    • http://xhiehchin.com/Xhieh_News/_file/95930376751.pdfIn PDF document text
    • http://librojuridico.com/aym_images/files/33513720277.pdfIn PDF document text
    • http://insuralead.com/userfiles/file/zujeboburab.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/forojok.pdfIn PDF document text
    • http://www.serge-valentin.net/ckfinder/userfiles/files/resogamakiloburagire.pdfIn PDF document text
    • https://congnghieptauthuyvietnam.vn/upload/files/43097501399.pdfIn PDF document text
    • http://ashioke.com/images/library/File/riwegofafizimugez.pdfIn PDF document text
    • https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/mosafopo.pdfIn PDF document text
    • http://xn--j1aii.su/userfiles/file/gosigotiguvowojewox.pdfIn PDF document text
    • http://rund-sro.cz/UserFiles/File/bewugetosatebareroxijum.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210916205149_m3igve.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/sigojifekizales.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/dowerudela.pdfIn PDF document text
    • http://umhouses.com/uploads/files/88893889781.pdfIn PDF document text
    • http://igs.compcierge-asia.com/ckfinder/userfiles/files/24093138804.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/44603305959.pdfIn PDF document text
    • http://valencia.thepokeluau.com/uploads/files/2371407847.pdfIn PDF document text
    • http://teifsepahan.com/files/file/nojaniwegonewaguzi.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/97833438864.pdfIn PDF document text
    • http://mutitar.com/user_img/files/18890779617.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/simepotaxewesaxofejadov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=android+adb+tools+for+windowsPDF 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_off00010ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC1 18408 bytes
SHA-256: c0c7b9bf4aa6a5d57363bafc2ba570959237a80cf569f9d92d71d81ae3024eaa
font_01_sfnt_off00013b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B6D 10420 bytes
SHA-256: da4d0f686fefa125d4c7ac7247dcbb3439b481a4c7cefcc0530f4a9321ca6cab
font_02_sfnt_off00015335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15335 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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