Malicious PDF — malware analysis report

Static analysis result for SHA-256 d51a1ffe9cd349d5…

MALICIOUS

PDF

80.2 KB Created: 2021-09-19 22:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 13ac749eff8fc4bbc351ac6e9d4e09f7 SHA-1: 5e2cc1e1eb315e2365712cfdd9cc59687ac2a10b SHA-256: d51a1ffe9cd349d52599aa7fd0692661ac5f2e60b404e30462e2cddc15397d05
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised CMS uploads and disposable hosting, indicating a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing campaign, likely using JavaScript for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://allytemp.ru/uplcv?utm_term=in+the+room+movie+online PDF link annotation
    • http://alconsprom.ru/ckfinder/userfiles/files/12637393580.pdfIn PDF document text
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/buzopazirolikiv.pdfIn PDF document text
    • https://kerryparsonsfoundation.org/media/file/80411209152.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/kefejumetenezagimuse.pdfIn PDF document text
    • http://samurairamenbar.com/uploads/files/kogexaximidezufi.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea7d9eef9c---96115142124.pdfIn PDF document text
    • http://choragwica.pl/userfiles/file/gibipanutuxoxigevufopaw.pdfIn PDF document text
    • http://klm-co.ru/foto/ck/files/lorozitujuw.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d12e53472---kaziriwobitoramugujigaben.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/4fd19e5068a002c20edb319dc3e6404f/39582788236.pdfIn PDF document text
    • http://neoclassicalmansions.com/uplds/file/funubakegok.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143923697121---pukumipezojalazikag.pdfIn PDF document text
    • http://ldkxzzs.com/images/userfiles/file/61994342892.pdfIn PDF document text
    • https://digicpictures.com/downloads/90040513095.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/kezidirirasukadasilud.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/50544068467.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/24aee62150d1c0d7e6e3a966758535eb/48172405019.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/xoduxadepejof.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/xojoxopisekizajida.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c56e210929---subosopojajog.pdfIn PDF document text
    • https://thietbixaydungcantho.com/canthomobile2/public/images/sanpham/files/wanovafadoxeleketusowokak.pdfIn PDF document text
    • http://myucpb.com/userfiles/file/zadazegegipibuwesisunolu.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/lozazirawusoluvox.pdfIn PDF document text
    • http://fertilityupdates.com/userfiles/files/zamuwegakewo.pdfIn PDF document text
    • https://monyetjoget.com/contents/files/lidobupefufifum.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_off0000d8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BB 17496 bytes
SHA-256: bf2d9805e19761222a9dd95d434bc9d2dbbe46baf355996d69ad70798804d150
font_02_sfnt_off00011d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D93 10060 bytes
SHA-256: 5a863101aaba912284abf1124b12f77b95eb45c685e5766417ca464dde8ab437

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