Malicious PDF — malware analysis report

Static analysis result for SHA-256 d93f5eec579712de…

MALICIOUS

PDF

68.2 KB Created: 2021-09-25 11:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c2ae9e3c5a7269964db15283d6671604 SHA-1: efaa22b85cbc83ca35755aa2fffd86b4ab85c129 SHA-256: d93f5eec579712de233bc9dde3fa7844ff2ce6506cbc79706a80ae72d6e357e7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a link farm pointing to compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect users to malicious content. The document body is heavily obfuscated and appears to be a screenshot, further supporting the phishing lure tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 1 text block(s), carries a click-outward action, and is only 68 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://alshamiltrading.com/alshamilfiles/file/wunomukojomiluvasegitose.pdf In PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/33419163ec3d8eee79d42625085caf3d/sivivixo.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134304ccfa2e---4492286755.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614389bb13a73---lugejuxomap.pdfIn PDF document text
    • http://valkexclusief.reviews/app/webroot/files/userfiles/files/gibigi.pdfIn PDF document text
    • https://pleasanton.com/wysiwygfiles/file/10785177636.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/85135827982.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/78aa3de806015adccc1e884fb1730f8a/78578653105.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/dusejovi.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161456066857a1---58715676267.pdfIn PDF document text
    • http://apcmagon.com/userfiles/54920265920.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/zonepodatotosemu.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210902_9B68DCDCC1A251B9.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/7671ff7a8a89e9151b67fe21fa527ae7/rirajetak.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/ebc49a4c6160789ca0468290c246a1c6/pitoloxuz.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613316bd92cb8---37254532129.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161400a6330280---dirobuxizepukamafitubod.pdfIn PDF document text
    • http://videocycling.info/files/file/jerubemijo.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/xurunikakarerevegulorifug.pdfIn PDF document text
    • http://namuvaldymas.lt/userfiles/file/faxovanunaxapetepi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=top+10+football+games+for+androidPDF 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_off0000addd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADDD 14428 bytes
SHA-256: f1dc2cbe675358ec2c7541d9da929925aac8153043e8716dcf9e48587043edd4
font_01_sfnt_off0000d220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD220 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA37 11120 bytes
SHA-256: 01c426483352c5c167f7ed9baac197b7e263fd97bbaf188470728faada9e00f3

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