Malicious PDF — malware analysis report

Static analysis result for SHA-256 807e00abc8b7b8fe…

MALICIOUS

PDF

72.8 KB Created: 2021-09-20 11:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 32e19aa3ffb23a5a5991727bf987c264 SHA-1: c404f026cd10dacdf69b7195aafaecafb035668e SHA-256: 807e00abc8b7b8fe1fe0c8f01499dfbef87dee01680e709c05009d28ebf80ac2
196 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains numerous links to external resources, many of which point to compromised WordPress installations and disposable hosting, suggesting an attempt to distribute further malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=free+sports+channel+on+firestick PDF link annotation
    • http://jan-fotografie.nl/upload/files/42321870195.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f02600bd4d---gikodipawip.pdfIn PDF document text
    • http://copy-office.it/userfiles/file/19571019610.pdfIn PDF document text
    • http://vindindex.nl/images/uploads/79467958802.pdfIn PDF document text
    • https://groupekheidri.com/ckfinder/userfiles/files/1641097126.pdfIn PDF document text
    • https://patc.fr/imagesfile/fuwetolazabemofitotigudud.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/pijekopigujadadize.pdfIn PDF document text
    • https://rwd1.thadv.com/upload/files/nepajuwo.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/6500481597.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/22896960650.pdfIn PDF document text
    • http://peak-experience-japan.com/images/blog/file/kilerurapoliw.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/576f4fbf9737d7ab8953671e465361f9/fiwimilopunajabuwapo.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/nsoddk2973dabkeui9qqmkti11/mafuvilenegux.pdfIn PDF document text
    • http://www.anglometais.com.br/adm/Editor/ckfinder/userfiles/files/mefulomi.pdfIn PDF document text
    • http://ketphatthinh.vn/upload/files/25598591828.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/69466065424.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/sghkcgnp8umisdchuqevmc00k7/89302644132.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents/files/dolekome.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/161362e717617a---tepuxo.pdfIn PDF document text
    • http://alhegazgroup.com/userfiles/file/jupajawamefajaku.pdfIn PDF document text
    • http://topspeed4wd.com/ckfinder/userfiles/files/93744607141.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/wixivujawatuvexonemumodu.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/98471625192.pdfIn PDF document text
    • https://ceiling.holcom.vn/webroot/img/files/75574397224.pdfIn PDF document text
    • https://aksusu.com/upload/files/lubazagun.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_off0000b960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB960 10644 bytes
SHA-256: 277e3cd0911b279a588a516e8f2498add82703538380053392e7c26356eb650b
font_01_sfnt_off0000d1a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A3 16860 bytes
SHA-256: d5a8b04141f5e6d203ad7a7c7fa8ad975078b134fc2d6093be590d227403fd36
font_02_sfnt_off0000fda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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