Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee0457b047d8ac9…

MALICIOUS

PDF

69.3 KB Created: 2021-09-29 06:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 38e0c421f2291508ff328e0c485260ec SHA-1: e0514830dcd32659cef92e97d7b70a33a53c67ca SHA-256: fee0457b047d8ac9fbb7dd4c7848b4fed28b1aac7a4557e29295b1b4a0029d97
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains an image-only facade with a clickable action, typical of attempts to trick users into visiting external URLs. The numerous embedded URLs point to compromised CMS uploads and disposable hosting, suggesting a campaign to distribute further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 7

  • 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 2 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nomylo.ru/uplcv?utm_term=how+to+stop+torrent+software+in+android PDF link annotation
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16134349c9985d---ludogejaratep.pdfIn PDF document text
    • https://deitratech.com/userfiles/file/tenoxelikaxux.pdfIn PDF document text
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/vidokadedede.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/70405626421.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/wuzod.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161537ab6c6f39---wuledumirudekokoxol.pdfIn PDF document text
    • http://huzatfokozo.hu/editor_up/kitemarowukemoj.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/nifulilugifu.pdfIn PDF document text
    • https://www.de5dollarsdigitizing.com/ckeditor-ckfinder-integration/uploads/files/zugiduwo.pdfIn PDF document text
    • http://panova-art.com/files/file/goxubadexiporure.pdfIn PDF document text
    • http://aroma-es.red/yamituki-n/uploads/files/73955800478.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/zumetazarozedonoja.pdfIn PDF document text
    • http://officeharbor.com/pdtInfo/rodiwafetupegelasewosi.pdfIn PDF document text
    • http://savitapiti.org/ckfinder/userfiles/files/bawirixuwib.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/66550721083.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/80420715962.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/jozuvetebefemalafeko.pdfIn PDF document text
    • http://investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/soguxogojobo.pdfIn PDF document text
    • http://kryotherapie.net/neu/userfiles/file/wupagatamavajased.pdfIn PDF document text
    • https://etevent.itweald.com/uploads/files/61365424d5e88.pdfIn PDF document text
    • http://michelschuurmans.nl/images/uploads/file/31890438261.pdfIn PDF document text
    • https://vetregistr.com/ckfinder/userfiles/files/36379991753.pdfIn PDF document text
    • http://vibrobeton.by/pics/files/72067511728.pdfIn PDF document text
    • http://www.ciesol.com/ckfinder/userfiles/files/kilovupulurug.pdfIn PDF document text
    • http://rheumatology.institute/upload/content/file/suzinumokisigareranemap.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/bc64aa9101ff0a01122adc677b302184/32221465433.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://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_off0000b1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1AF 10520 bytes
SHA-256: c654cfe5e10a79d65402f488073dce9aaf616f7575f0e362bcdb88f67ae7a56d
font_01_sfnt_off0000c9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DE 14512 bytes
SHA-256: b20ce09fa433ac89d0e4f8ce1b949d0a16a652db5432bccebd59ee302ca12b67