Malicious PDF — malware analysis report

Static analysis result for SHA-256 1547acec0e14934a…

MALICIOUS

PDF

87.9 KB Created: 2021-09-17 00:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 94faa71adee77551646a20812261aee5 SHA-1: c67051b5e926dd9f86f60e26481bab87f9e4ce7e SHA-256: 1547acec0e14934a3db8db6a98fa302b5d187a3e5d218e206c877292bd21ec10
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://garglob.ru/uplcv?utm_term=fast+followers+%26+likes+apk PDF link annotation
    • http://thrifthelp.com/flash/thrifthelp.com/file/mubovapozofipanajerirofol.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/79799931878.pdfIn PDF document text
    • https://fgcrubochi.com.ng/ckfinder/userfiles/files/88028162872.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/favidujidepi.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161311da5b7d0b---mefilujulezi.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/subep.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/9e2c1bfd211143940a27736bb5475447/26519053056.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/34298581149.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/18920363078.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/294c5c0bf93bf6921383272f847b036d/44484825913.pdfIn PDF document text
    • https://cs168.tw/upfiles/editor/files/92123405422.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16142ed1363c8e---xulafet.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140ef9cdfe8b---82281460504.pdfIn PDF document text
    • http://dogalakustik.com/depo/sayfaresim/file/gunewadi.pdfIn PDF document text
    • https://linkevicius.com/upload/galery/file/32408161355.pdfIn PDF document text
    • http://www.sandipmallick.com/fckimages/file/68260522553.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/161370b68e75d8---vowevorikogotulodaza.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/48787463037.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/bdac77245a0d87dae73cf6f79e48c199/gevofas.pdfIn PDF document text
    • https://advik.net/userfiles/file/mixisiremowiru.pdfIn PDF document text
    • https://nieruchomosciprzetargi.pl/files/file/woxowadebako.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/suvinujoxurepanad.pdfIn PDF document text
    • http://fk-fudosan.1nino3.com/app/webroot/img/userfiles/files/29413232394.pdfIn PDF document text
    • https://bizimpin.com/calisma2/files/uploads/52026209396.pdfIn PDF document text
    • http://normel.org/files/upload/file/23267439151.pdfIn PDF document text
    • 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_off0000f536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF536 10076 bytes
SHA-256: 38fd7d30907aba3b9368edf1b51dd11ab9391fb1fdc3e4175da6411030bbce45
font_01_sfnt_off00010be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE5 17856 bytes
SHA-256: cdeb9b799746d37ba730f7d935a8cf5f70af3537c2456e297f5d8806f8135545
font_02_sfnt_off00013a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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