Malicious PDF — malware analysis report

Static analysis result for SHA-256 08bba964a0988297…

MALICIOUS

PDF

86.7 KB Created: 2021-09-07 09:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ac2550febb4559c01653183ab232bba8 SHA-1: 07a11733aa943126383715efa91f7c0186d0291c SHA-256: 08bba964a098829786e1a4902b66fc46593533bfcbc01aac143fcb56d46198d0
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous disposable hosting domains and compromised CMS uploads, indicating a phishing or malware distribution attempt. The presence of multiple external URIs and link farm indicators suggests the primary goal is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 https://rowadalbyt.com/userfiles/files/69217269961.pdf In PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/15367078104.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/sefewijujureraxigedibi.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/77068535167.pdfIn PDF document text
    • http://olympusflights.com/files/files/gones.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/92b11e5230ab51c91776488da87be63c/72227042871.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/95223578835.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a12edbac29---56338954962.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160721245dcd78---webofakogomufezomatosawe.pdfIn PDF document text
    • https://unosms.us/userfiles/file/53296408094.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/qdjbdvreubc5vijma975grf0tp/jateziguxorewigekotipaj.pdfIn PDF document text
    • http://eternaseguros.net/files/files/20293341519.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/97280239113.pdfIn PDF document text
    • https://innotek.vn/uploads/news_file/35820050535.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ih8qkct804qj61r0m49v9r0lt3/91986495338.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/xakawuxademanipuwonu.pdfIn PDF document text
    • http://kool-house.com/upload/editor/file/16856165045.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/bf0f44c7fff32800cf79532ac2341c60/nifiweneporigo.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021631038199350.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/16398744399.pdfIn PDF document text
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/zavofesozipip.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/m3l6bv7b59fmr8j0u7l2n7n4p1/logem.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/43648260655.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/fo1rnfb90961c839qkdmtqcsd7/pefelinezivuzosagivog.pdfIn PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/poxulezanizometelu.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16130300ca24a2---31843423412.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=inversor+de+frequencia+danfoss+vlt+micro+manualPDF 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_off0000e947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE947 10900 bytes
SHA-256: 95473358e8a3bac8f86cf0f20c0b596f8181a17394409f25d5ce61d2eed76eb1
font_01_sfnt_off0001024e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A60 19272 bytes
SHA-256: c5ae8867bbe032dce3d5797a6593dc2739a932b999749feb8bf7c548214f777d