Malicious PDF — malware analysis report

Static analysis result for SHA-256 acdfc6c68cfaba2c…

MALICIOUS

PDF

91.1 KB Created: 2021-07-07 02:34:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5eddc247a0521439abf7a10b35fae549 SHA-1: 2d5e085416e6ca3f91de3b7736f45ee76dc3b5f7 SHA-256: acdfc6c68cfaba2c810d9c19e4cb562a1e8ff50b15afcff2e1366b4095888d4e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm hosted on compromised WordPress sites. The presence of multiple URLs pointing to potentially malicious PDF files suggests an attempt to distribute further malware or lead users to phishing sites. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/c79503ab80a274de5d18869ae9986ec2/60962136779.pdf In PDF document text
    • https://realxenon.ru/uploads/files/73369675349.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/48b8ed477a4abb49922cdaabc0e7b50e/nepolegedewogaxima.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/fuxowesofiwaritudafitati.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/81434659555.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/a0nkjnbvn215bojgjmebpe0tj5/37909705414.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/zajixatosimobovaniwevo.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/xuziwufunuvefujani.pdfIn PDF document text
    • http://kientrucnhacuagio.com/upload/files/vediladojodazemuko.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/legupibidizofogerepebel.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b167a42a647---gapiriwifiwijesumobif.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/mafutegunedeget.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/6189839604.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/46818148153.pdfIn PDF document text
    • http://nhandieurangmuoi.com/ckfinder/userfiles/files/goromubak.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a328ba6de07---99150871200.pdfIn PDF document text
    • http://wami.cc/data/files/25802750493.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/f27528d74a26560ca09b8607a58db139/4816700038.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/ir3tm84rjng1eqa60q232ffhen/70381990053.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/de203183d84141194d34b05d30360081/gabovibokeruwedubutaxev.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/75872198333.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/u3qbco6rh2qedg8lip6rffm5k0/wetumudowumexisemarawuvil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=mole+puns+for+chemistryPDF link annotation
    • 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_off0000fef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF7 10792 bytes
SHA-256: 280dd94de2f4175cdbc88c883219670c4c120dd7a5da427f81a9d17fde8a1b76
font_01_sfnt_off000117ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AD 17744 bytes
SHA-256: 0d9508c10e34e979cf840f9ff5298558fe737c2f1a03efd757c8e00b28928a4e
font_02_sfnt_off00014613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14613 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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