Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec617c26a921480…

MALICIOUS

PDF

68.3 KB Created: 2021-09-29 12:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6623b71b7325107cd7f6f45f97232250 SHA-1: 50faf0a101ab3cb0d79c601e23c1c5f976b45a29 SHA-256: fec617c26a921480a7b0a24eafae79af91548027123f6a2e3eab82d3d74dd8a0
146 Risk Score

Malware Insights

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

The PDF is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's an image-based lure designed to trick users. It contains numerous embedded URLs, many of which are hosted on disposable domains, suggesting a link farm used for phishing or malware distribution. The file's structure and content align with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://worshipedia.mobi/sites/default/files/file/samodesozetiturawejiba.pdf In PDF document text
    • http://www.gamylai.vn/uploads/files/wekusasenunun.pdfIn PDF document text
    • http://kavernoklub.com/campannas/file/94068720128.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/82678903808.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/radusuwodegakiwekex.pdfIn PDF document text
    • http://honeycontacts.com/uploades/userfiles/file/81329402244.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/fexulatifefajamigawesejav.pdfIn PDF document text
    • http://dae-young.kr/upload/fckeditor/file/68426368571.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/kavajokubirugom.pdfIn PDF document text
    • https://vili-al.com/uploads/wysiwyg/files/78411390153.pdfIn PDF document text
    • http://epwuae.com/userfiles/file/40352469566.pdfIn PDF document text
    • https://skopjemuzikon.pmgrecordings.com/ckfinder/userfiles/files/bibuwajovof.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/rutivobode.pdfIn PDF document text
    • http://world-spa-resorts.com/dok/dajegovepikufi.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4ecb266f0---96149073600.pdfIn PDF document text
    • http://federicozucchettiarchitetto.eu/userfiles/files/56458184139.pdfIn PDF document text
    • http://optykglowacki.pl/obrazki/files/mewipovufipavawi.pdfIn PDF document text
    • https://svltv.in/userfiles/files/94428664457.pdfIn PDF document text
    • https://araprinter.com/ckfinder/userfiles/files/82730077887.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/luvabozevufawowamoz.pdfIn PDF document text
    • https://asiahealthcaredentalcentre.com/ckfinder/userfiles/files/zelodojom.pdfIn PDF document text
    • http://warmistore.com/userfiles/file/nutelapikulag.pdfIn PDF document text
    • http://www.ez4parcel.net/upfile/files/2021/09/19/94952920463.pdfIn PDF document text
    • https://ceiling.holcom.vn/webroot/img/files/17265848034.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=javascript+android+frameworkPDF 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_off0000af75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC787 13936 bytes
SHA-256: 4616a401ded005c92f3266361c677a2cdd6a6f5283ff8437e2556d3f0907183d
font_02_sfnt_off0000ea0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0F 10968 bytes
SHA-256: a3cb3738468f7a7908d9c187e8dfcef889add81e34d9874ea2c97be3b5636cbc