Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda45331c7497077…

MALICIOUS

PDF

78.2 KB Created: 2021-09-16 16:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 70dfc70c312710893b75a926ebe79203 SHA-1: 142499de6b4d2ecbba58bc80267e8d2f56f1c2ca SHA-256: bda45331c74970773e84f10a4ced1b7c14daee7c0cac31955b7ea8d2f589c7ad
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 containing a link farm and pointing to compromised websites. The ML classifier and ClamAV also identified it as malicious, specifically a phishing trojan. The embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://irlanc.ru/uplcv?utm_term=minecraft+java+edition+apk+award PDF link annotation
    • http://ohmamakitchen.com/uploads/files/kodokadasotivojoz.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/sobul.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/98229409763.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/29cd4bfd08a9ac67a8db42b422ccaf69/pepelitakubedet.pdfIn PDF document text
    • https://eyescare.vn/app/webroot/upload/ckfinder/files/wodewalojuvira.pdfIn PDF document text
    • http://tongshengchem.com/ckfinder/userfiles/files/regumademijorelaku.pdfIn PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/nelozowudob.pdfIn PDF document text
    • http://www.neoneofitou.com/ckfinder/userfiles/files/betixebutavusevogemoxerel.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop/contents/67918705761.pdfIn PDF document text
    • https://skinrepublic.vn/webroot/img/files/92582098193.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/95384520653.pdfIn PDF document text
    • http://dentistturkey.com/image/files/80533358662.pdfIn PDF document text
    • http://siddharpeedam.org/userfiles/file/In PDF document text
    • https://advance-pack.com/editor_upload/file/15884606854.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/68884533110.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16140fcfc175c5---kovojedi.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16138eb4570ed7---majema.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/ketepuwazakagasekizu.pdfIn PDF document text
    • https://codecs.ro/images/file/dosopujolufabelejol.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/7440595205.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142baad04a00---jawinaroweni.pdfIn PDF document text
    • https://profesa.net/userFilesfile/70793868664.pdfIn PDF document text
    • https://raguvosbaldai.manovonia.lt/images/files/561343.pdfIn PDF document text
    • http://telesson.net/_UploadFile/Images/file/81573124007.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_off0000cc51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC51 10768 bytes
SHA-256: 62f0a0c707a9b00bfae7ae93d1d885884867f4167ca6fe438148768288716f5f
font_01_sfnt_off0000e540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE540 17416 bytes
SHA-256: ee41da78a4e42a33a97f83240a9a41f0030276d0e5231f5be6f8082cc32a9fe2
font_02_sfnt_off00011293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11293 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.