Malicious PDF — malware analysis report

Static analysis result for SHA-256 02bb82f48a61d2bc…

MALICIOUS

PDF

86.1 KB Created: 2021-09-11 04:19:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7b4480fa16e6ae33bb0bae76070c58b4 SHA-1: b1e48e5fb1ac6465e898c4f72edbd81269fdc732 SHA-256: 02bb82f48a61d2bcc7c2f6eef7fbeff9a3df3697f8e8ec583469c171ec1f79b8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a link farm and a callback phishing lure, aiming to trick users into calling a fraudulent number. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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
  • 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.
  • 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://agri-mal.pl/userfiles/file/nasipanotuzofo.pdf In PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/narukefozulokivoperowofi.pdfIn PDF document text
    • https://mytopics.it/uploads/file/98330124653.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/l73bhv0up3v5uotsja2svoah2o/juridelefetozonovaxazivaj.pdfIn PDF document text
    • http://aqcorth.specialty-match.com/upload/files/papemutove.pdfIn PDF document text
    • http://capital96.com/userfiles/file/jumixunudebidetasasizeb.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/45254560335.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/godav.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613017c96f3ed---1701741045.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/zulodunez.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/bagewi.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/80359700580.pdfIn PDF document text
    • https://webrobogo.hu/kepek/babonopojopiw.pdfIn PDF document text
    • http://megalaserasia.com/upload///55347768852.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/61065331185.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/33256974412.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/20879944598.pdfIn PDF document text
    • http://el-system.jp/uploads/2012/files/9906428341.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/24734659278.pdfIn PDF document text
    • https://skykharchono.mn/editor/files/kaxuduziroratigimoli.pdfIn PDF document text
    • https://ikuseikyokai.jp/ckmedia/files/24140905382.pdfIn PDF document text
    • https://tradegateindia.com/userfiles/file/ziwixuxevemizolasaguf.pdfIn PDF document text
    • http://rubella2.integra-sh.com/userfiles/file/porurubaremu.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16137618612b33---tobisudinuromenubikab.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/nupowerifukipujosifonubop.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130e365c65ad---zasufapeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=redmi+note+10+pro+first+sale+datePDF 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_off0000e580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE580 19960 bytes
SHA-256: 6c20f650581f004e982b674a6ffd29e5a533a683b112dc413b0786d49233f970
font_01_sfnt_off000119c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C8 10880 bytes
SHA-256: 7a76f18d1e29806a3b9ebc24e700e4651ba14558f9185e6034fdae054f8610b6
font_02_sfnt_off000132ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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