Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e0f1e0e4b68efb…

MALICIOUS

PDF

80.2 KB Created: 2021-06-27 10:25:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 0301eb89391872e6a943ad5032b60bb6 SHA-1: 13b0b46c5f178cc50113120d46302af6753f38dd SHA-256: 27e0f1e0e4b68efbc8a1564904ce43cd51e38007545afa6d95c7ffb9810630e9
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of numerous links on compromised domains, coupled with the 'utm_term' parameter suggesting a lure for 'messenger download android apk', points towards a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a377e63e5---zesixumorivozokazajep.pdf In PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/ea62ee97da2b0f20c5fc1bbe9189e8c3/luwinokekolewufunumuwewu.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8mf6ip9n48q1t235glc9uesp11/vewujezawewufeboxe.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/l20mtaqk6520b76edg2gea56fr/tavexoroxovozaji.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/05chp2adrjdvinclaavg3l83oe/23259103961.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/n3trf9djdcvohb3in3cnp73mdu/98316100541.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/lorixigepo.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccf6393d38---pinepapoxijufimefetoro.pdfIn PDF document text
    • http://brlairport.com/images/file/nogekesefetikodavob.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/wirowupigilodanisozogak.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160badf271fbd4---fenixobalukiroxoguzajuf.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ada1cd9eb---fasowokedavajulisil.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/3aa24fdc40d07080c7556d92e25c73fa/sumubo.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/08icr44e8j4phrlb9cepb3ggk7/bodode.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/vupiw.pdfIn PDF document text
    • http://briarcliff70.com/clients/874901/File/gimavubadakune.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c509910c5c9---75956021343.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/41277531695.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/ehebqitms77ud4jduuf42lnj85/dejifiwizobubativexa.pdfIn PDF document text
    • http://houselandia.ru/files/nelupip.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/rikipinexetamopupamilipi.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/dd68cdeaee311b8d8cbef89a632d0f5a/buberamolowa.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0f832451e---vizirusobutize.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/62d8b35e7d152f06dd60d0143ce8abe1/30520741444.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca5cf97bf8---25070387600.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=messenger+download+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2B 15644 bytes
SHA-256: 931b4f2c26cf0cb4ea2acdc035a67312d8ec2ed0d0a4e1346b192fe5d86389bd
font_01_sfnt_off000102e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E8 10640 bytes
SHA-256: 9a03ad931e48f6779f49bc2385280ba297a104058deba918a5aa149667b7c635
font_02_sfnt_off00011b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1