Malicious PDF — malware analysis report

Static analysis result for SHA-256 053288fac2068b4b…

MALICIOUS

PDF

82.2 KB Created: 2021-09-13 08:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 598661166040f873757c405a2254988c SHA-1: b30115a89a4ec11a3a0c56dcc163d7b6126bd0df SHA-256: 053288fac2068b4b4218a94f925f68766a094b325e7acd5142ae517ad2eeb1a0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document was flagged by ML classifiers and ClamAV as malicious. It contains a fake CAPTCHA, a common lure to trick users into clicking malicious links. Several URLs were extracted, some pointing to compromised CMS uploads, suggesting an attempt to host malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/161347acb85736---81785408423.pdf In PDF document text
    • https://ivanda-commerce.hr/userfiles/file/46552952074.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/54112664687.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/09/13/bujipiwipofawisaj.pdfIn PDF document text
    • http://minerva-collection.net/files/files/titojagepapizokezux.pdfIn PDF document text
    • http://hcm-invoice.vn/hinhanh_fckeditor/file/24106422908.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/027bbheq0bh3h2mnhd72fvleu7/sivowadematiposebidifigib.pdfIn PDF document text
    • https://casasholidays.com/scgtest/team-explore/uploads/files/50822953574.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/gakil.pdfIn PDF document text
    • https://philly.drinkpoint.com/uploads/files/xofasazimixukakumuzesod.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/93230867443.pdfIn PDF document text
    • http://eunlocker.com/Images/Editor/file/40575075574.pdfIn PDF document text
    • https://speculatio.in/ci/userfiles/files/parigetewuxuti.pdfIn PDF document text
    • http://www.sauminandy.com/fckimages/file/18845606287.pdfIn PDF document text
    • http://89928386.com/uploads/files/202109060024257561.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/sotilepiduwoxosubot.pdfIn PDF document text
    • http://xn--2e0b30g3uq7pay7m.com/upload/fckeditor/file/4131771453.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/winodazubemuwoduzebi.pdfIn PDF document text
    • https://hsiaoying.com/userfiles/file/25016282370.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/34085024647.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/98953938c7d87cb31d01dc70b4aa0dc2/lobewuwuno.pdfIn PDF document text
    • http://vpsystem.com/files/fck/ladutemomusokokunaguriko.pdfIn PDF document text
    • http://dealershop.es/camarasegovia/userfiles/file/zijuwadatixuka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=super+smash+flash+android+apkPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31D 17976 bytes
SHA-256: e06abac98407d023605354acf1f32c95a07d2994882da11e3ae7452df087e48b
font_02_sfnt_off0001220b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1220B 10932 bytes
SHA-256: ff1d01e78c0d6520484068ee51f891a3ca825cc0b70931173c8df6788c667c00

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