Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0e02765a6a549c…

MALICIOUS

PDF

68.4 KB Created: 2021-09-06 00:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 733481a92455a4d556c4b54734b099d0 SHA-1: 83ae9b8567fecdedd7ef016003fd8b76f3c6a387 SHA-256: fa0e02765a6a549c3a074d10d105bf09910b647d2340448f248c82e181707739
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as a malicious PDF by ML classifiers and ClamAV. It contains numerous embedded URLs pointing to various websites, many of which appear to be compromised or disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded content indicate it's designed to redirect users to external resources, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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 http://apexnepaltravel.com/userfiles/file/74248733521.pdf In PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/49000118942.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083dbd1c6567---vanafofumixevulowaralej.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/51671288547.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb1ca5f0127---betaresejajurajakasijuku.pdfIn PDF document text
    • http://balone.net/_upload/file///pipemefinirijesojesabinis.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073285bde000---55606555847.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/832ad6654cf87d85efa8fb9b88a1b5cf/sazirimugo.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087c3649585f---wemajonufabep.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/33718167134.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/98807042095.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35ec973a44---74949748816.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/zegabilebuluwanudova.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/rewaduniboxukodunepugu.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/firamiru.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/nowelimek.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/04ef1f567246e105e770a78c6a47314c/ratevivuwipolubin.pdfIn PDF document text
    • https://papersacksfactory.ae/images/bulk_images/files/51707128206.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/51559914348.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/88654169765.pdfIn PDF document text
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/polefesotuwusoles.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/zawafeladifidifev.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/suboritef.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/rlll9k8ghd6jqbvtett008sg28/56353181264.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/nagavinilovux.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/39699154177.pdfIn PDF document text
    • https://xylemleads.com/userfiles/file/zamikig.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/94818155758.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=d%26d+5e+midgard+heroes+handbook+pdfPDF 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_off0000b5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C3 9076 bytes
SHA-256: f695977626623e59fedb2fbedebd468d0acf89ff6f6ceafeb3cee4351ddee6c8
font_01_sfnt_off0000c864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC864 14408 bytes
SHA-256: 0de4b49d4b6d44badf9f45981b60ce834f57db09ace0807ed1a9d91fccc1f995
font_02_sfnt_off0000ec5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1