Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f02e992a822f14…

MALICIOUS

PDF

79.0 KB Created: 2021-09-13 06:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: df2f1d6ee30b050ec009ba0fe2650e38 SHA-1: 93e17608d1438b58ea975b3710476610030c7d49 SHA-256: f2f02e992a822f1415ba69265d4a0368d8be161069905f95779b1e280df03f88
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it is a link farm and a callback phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content or initiate a phishing interaction. The presence of multiple unknown URLs further supports a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://mbzgogo.xyz/web/img/podborky/files/39695316086.pdf In PDF document text
    • http://medianet2000.net/amm_prod/image_news_popup/file/tutaga.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/pafanavefozap.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/77012475336.pdfIn PDF document text
    • http://gro-felix.si/uploads/32391165792.pdfIn PDF document text
    • https://psihodesk.ro/ckfinder/userfiles/files/rojomovatikowo.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/xorazotufirepu.pdfIn PDF document text
    • http://datong-travel.tw/upload/ckeditor/files/20210905013356.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/6370549521.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/xuzitexikisuz.pdfIn PDF document text
    • https://paeonia.ch/userfiles/files/16228303187.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/sabifazufidimo.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138cecd07ca8---kakugakifuvavikusezuno.pdfIn PDF document text
    • http://yyfxsw.com/upload/files/23922065797.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/dovaxunamivujuwataruri.pdfIn PDF document text
    • http://ruishikaishi.com/upload/content/files/2021/09/20210909102035.pdfIn PDF document text
    • https://daynexweb.com/upload/ckfinder/files/ziwuzimogolebexotulujaf.pdfIn PDF document text
    • http://aristosaigonhotel.com/uploads/files/23827456609.pdfIn PDF document text
    • http://starinviter.com/ckimagefiles/putejezikodu.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/27801909016.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132beb73fe4a---jagudalexutidusabibov.pdfIn PDF document text
    • http://nilesk.com/userfiles/file/75903521630.pdfIn PDF document text
    • http://spzpoz-zdunskawola.pl/upload/file/33845001133.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=video+joiner+apk+downloadPDF 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_off0000cf98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF98 10396 bytes
SHA-256: eb004a47d0b8c84c645a10e4fe6129760ef47c5ea2a651f4aa3113e021c9a387
font_01_sfnt_off0000e72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72A 18312 bytes
SHA-256: 94b0a7985b1dd1be598446e023fce48aa31a8b5585a3c8ac2230f7e2b5bb3ce0
font_02_sfnt_off000116a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1