Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d0e46cfb916756…

MALICIOUS

PDF

81.0 KB Created: 2021-06-27 07:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c259f49bc18a5d3ffc95166df1872267 SHA-1: 997294b140448bdeb9309f33d3482b2e9371e6c4 SHA-256: e5d0e46cfb916756160eacf389d9345ccab2dde9903cf101a92835a516aac355
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to host and distribute malicious content. The presence of numerous distinct hosts and the use of disposable hosting indicate a tactic to evade detection and facilitate phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/8890ab59516c699b076f2dd7cf10bbae/29953086505.pdf In PDF document text
    • https://iqmuseum.mn/uploads/files/zafogomezalaxabu.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/kvheegs41ok1gbteckisi0q307/bekafeliwozepoj.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/75e92c5faa40a8cc30b19a0ca1103412/19748061399.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/55236104881.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///61988338841.pdfIn PDF document text
    • https://oumkua.com/userfiles/file/70201838692.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609058b20e10e---75345976852.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5idqmpfeg80rllv3mtuf18phn0/65040527316.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ad84418a0---10781821995.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073a2988a5c7---34978182886.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c65089af6---kukomoxorubitogawof.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a65ce7b764---sutam.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/gufasuvibi.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/77822185053.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/f7dc4abccc96fb675de895eb466d311e/47159386377.pdfIn PDF document text
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/61961658781.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d13911a88---91928890380.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/70925848588.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/878ae21ac6f3c41a97989737b6f6f9bd/34592713534.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/3550b75edaf1069b48ab3b597c0e0795/61615435706.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/6q0g24771frqegp3v51b2nesjd/pexevalokidofujefiminugu.pdfIn PDF document text
    • http://yjccnc.com/upload/files/rakojuramofipiw.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/jiwifabalujobidufiwenive.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=lae+controller+fault+codesPDF 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_off0000db59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF370 10432 bytes
SHA-256: 9a72e9876e99a1799b4217a6d63d5999c79eed66c6b0db636ccd7bff657f0c81
font_02_sfnt_off00010b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3A 16584 bytes
SHA-256: a43530abf31b7d5da127345e47a319861fe0896af7d0c2511919b42ea2533eca

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