Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4e57955eab48ad…

MALICIOUS

PDF

78.5 KB Created: 2021-09-17 03:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b80ff21ae501ed9c0da39b94835c1776 SHA-1: 5b5d4ead0b6f94ec27181c597302b985dbea1e2e SHA-256: 0e4e57955eab48ade98130a5c8917b5e5a8ba823f8873f78f474c38ff7952991
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ketchas.ru/uplcv?utm_term=the+giver+chapter+questions+and+answers+pdf PDF link annotation
    • http://opuspoint.com/ckfinder/userfiles/files/48732018901.pdfIn PDF document text
    • https://jagamimpi.com/contents/files/54878685796.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/21856762487.pdfIn PDF document text
    • https://clinicscrm.com/img/files/gikiveba.pdfIn PDF document text
    • https://onecre.com/images/content/files/verutopinuvuxebo.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/a3996cb464ea63d50da643302ea51a37/wubedire.pdfIn PDF document text
    • http://makairways.in/home/makairways2017/public_html/dowalumniusa/ckfinder/userfiles/files/jezubuzebupapegu.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16137f056c2347---68359289701.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/doluludegafuzedakozuf.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/2427737984.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/b6494608c517720b4137fba80fbcdeaa/ximumesatewenukolatabi.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/bokudolazibopevenege.pdfIn PDF document text
    • https://cobrawire.com/userfiles/files/rekanoset.pdfIn PDF document text
    • https://huaku3c.tw/uploads/files/202109131802558926.pdfIn PDF document text
    • https://pima-alarms.eu/slicice/file/80780958894.pdfIn PDF document text
    • https://rossbeede.com/userfiles/file/63524834839.pdfIn PDF document text
    • https://self-storage.sg/images/uploadedimages/file/63645443957.pdfIn PDF document text
    • http://jtg-antracyt.pl/files/file/31204979113.pdfIn PDF document text
    • http://ukonlinedirect.com/userfiles/files/tiwaxob.pdfIn PDF document text
    • http://flexinform.com/hirlevel/file/78950550308.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/161303d240ae16---xukemuxugalepasezofo.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_off0000cd41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE553 17396 bytes
SHA-256: e251723b4f237a79cce53ae51724f95ff0ae3f244353b8c5a396147d3bd5fab4
font_02_sfnt_off0001127b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127B 11212 bytes
SHA-256: 7ddbb275002ac93d07e584541d502dcfe7ebb77ce5abb371a9f896ae907c035a

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