Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2ec0c80a59b625…

MALICIOUS

PDF

82.8 KB Created: 2021-09-17 16:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0fc1c32093a0f8f017fcaa131b2664d3 SHA-1: e23a159fa6553addadd5626c2319fc143b4fa15d SHA-256: 2a2ec0c80a59b62537a9efec6b91d69fda3993e73507e349db4f1f2fe7a59128
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://chcial.ru/uplcv?utm_term=swipe+fingerprint+for+notifications PDF link annotation
    • https://footballsod.com/images/ck-uploads/files/xenuguseponoma.pdfIn PDF document text
    • http://a-xian-coat.com/uploads/files/202109010037176509.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/lamuxawowokabumezepe.pdfIn PDF document text
    • https://padservhosting.com/userfiles/file/64731054993.pdfIn PDF document text
    • http://humidorio.de/ckfinder/userfiles/files/pulewesubelexopuwipegobiv.pdfIn PDF document text
    • http://desiaussies.com/ckeditor/uploads/files/sevapiwigim.pdfIn PDF document text
    • https://toocapen.com/files/beliw.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/xirepanosiwapokubeme.pdfIn PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/mesubojo.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202109/file/11511588271.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/tenun.pdfIn PDF document text
    • http://residencelesaline.it/userfiles/files/walibulovoduzipom.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/97422767236.pdfIn PDF document text
    • https://quizai.com/uploads/files/12944127735.pdfIn PDF document text
    • https://stephankeppel.com/userfiles/file/katitavederizizenutakewo.pdfIn PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/gimajilisupak.pdfIn PDF document text
    • http://polaryachts.com/res/wysiwyg/file/zovakobinedilok.pdfIn PDF document text
    • https://testgit.begurholidays.com/uploads/userfiles/files/xalafaziwusugizifejigor.pdfIn PDF document text
    • http://sinsg.com/files/fckeditor/file/nozijiganekatisekipab.pdfIn PDF document text
    • http://www.videocopilot.net/assets/public/ckfinder/userfiles/files/78553481341.pdfIn PDF document text
    • http://artio.pl/files/files/mopifofoxijelumurago.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hiruad2qm9k79arufhl3mhfij1/zazewabegofakobur.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/ed2ff10ef39ec661dbe35f3750f7aebf/99712483035.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_off0000dc5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF471 18332 bytes
SHA-256: bdc3f2c25b254666fb8d508d86d64dd6dd232e10d9383d9355b81c8a98217863
font_02_sfnt_off00012468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12468 10772 bytes
SHA-256: edfac62116f946207653ce3bf78c943d92ef3ba7d5aad64b2f80903daea6f6a9

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