Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4ed49a106c1ded9…

MALICIOUS

PDF

68.5 KB Created: 2021-09-23 00:03:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: da910f9df0d3bf4e40a84f8bbcf5042b SHA-1: bee8225c7dac488e299204e3f80b82350bf5ea3d SHA-256: b4ed49a106c1ded94977396a494d904d3a385f650fd629c2fa355ef6242c9d75
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristics reveal it contains a link farm pointing to compromised WordPress upload storage, suggesting a phishing or malware distribution attempt. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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 http://evergladesharvesting.com/ckfinder/userfiles/files/bisaderaxanagase.pdf In PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jafopagaworaborakadafeder.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/ebc9fcaa0ae0bf11a95c8e8de35f305e/37840494964.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/161446ada05b64---dirujojivom.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/14c2f0a0d20df8734a053617af2ec62e/kenusajenoxaduvuj.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/85935366.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/09296bf405e2d02578b8cece0d379219/gunisuvoxavoliw.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16148772f23fae---34714857608.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/161384aa76d01c---xopukenivosaso.pdfIn PDF document text
    • https://nutrishop.in/ci/userfiles/files/fesutiz.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/11806437290.pdfIn PDF document text
    • https://dsverano.com/UserFiles/File/89761282058.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/38886741066.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/f59cba3b2f3e35d1463ed681eac79bbc/pozofasanozetobafiginav.pdfIn PDF document text
    • http://tyextractor.com/d/files/xeniragiwoxumunofegulino.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142901a0cbec---94294590738.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/77768745617.pdfIn PDF document text
    • https://proartgaleria.hu/files/files/parowajafoz.pdfIn PDF document text
    • https://discovercefalu.com/_data/images/file/pozuvofepevalajalatuzuriz.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/golekimomukutugazar.pdfIn PDF document text
    • http://abwrosedale.com/uploads/files/10849760283.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/67989319509.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=pasta+lixo+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_off0000b18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB18A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c99c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99C 14500 bytes
SHA-256: d8dcafc3718e8087cfd0d7dc003cf05119f8a890fa8d6211ff729409d79038c4
font_02_sfnt_off0000ee06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE06 10212 bytes
SHA-256: e2ab20569a2daad3997499e3d8b002ce416e996732fa0ad4f9f2b7bd8d893542

Open this report in the interactive analyzer, or submit your own file for analysis.