Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd570f7b9edfd65b…

MALICIOUS

PDF

70.1 KB Created: 2021-10-04 00:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5660a55d0eb4d796c59bea852e563cdb SHA-1: be51973df2c300ff063af12e81b3409b84fc21fb SHA-256: dd570f7b9edfd65b5861020c3634e35686f04d52ead7fff2ddce0fc9a96e952a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple disposable domains. The presence of numerous unknown URLs strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://safaraval.com/basefile/safaravalcom/files/46810132168.pdf In PDF document text
    • http://odpadykj.cz/UserFiles/File/xolevima.pdfIn PDF document text
    • https://on-call-anatomist.org/ckfinder/userfiles/files/65782323806.pdfIn PDF document text
    • http://tgroupsrl.com/userfiles/files/fizefegosofivitaza.pdfIn PDF document text
    • http://iltorg.ru/upload/file/wadutigon.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/fatifijup.pdfIn PDF document text
    • https://bluetact.com/ckfinder/userfiles/files/kisip.pdfIn PDF document text
    • http://maychaybocaocap.com/app/webroot/uploads/files/64020322390.pdfIn PDF document text
    • http://petrduchek.com/files/57503061588.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/bopat.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/fekesumumijego.pdfIn PDF document text
    • http://satyavnetworks.com/fck_upload_images/file/filawarusu.pdfIn PDF document text
    • https://kocgrafikavukatwebsitesi.demowebsiteleri.com/upload/files/43059427819.pdfIn PDF document text
    • http://lindendirect.com/ckfinder/userfiles/files/tuwemibaxe.pdfIn PDF document text
    • https://univerosg.com/ckfinder/userfiles/files/36583666077.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/edpcn7rao8rgu8gc4d61o29f1s/vumeko.pdfIn PDF document text
    • http://tauroconsulting.pl/userfiles/file/98849986286.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/kibor.pdfIn PDF document text
    • http://seychelles-resort.com/images/blog/file/57999622719.pdfIn PDF document text
    • http://szymonadamczyk.pl/uploads/fck/file/13356218908.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/gewupegetal.pdfIn PDF document text
    • http://helenhotel.vn/upload/files/guvavujigemojifajux.pdfIn PDF document text
    • https://foodexgida.com/uploads/files/pokububumomil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=meaning+of+doctor+in+englishPDF 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_off0000afdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDC 10748 bytes
SHA-256: 5ce3b54fe51ff62b76b9bb6c89ebf7436822d0bc629582db1fba5e0169cce6de
font_01_sfnt_off0000c848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC848 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e05a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05A 16828 bytes
SHA-256: 9dffe572d0ad6e13fe8e13c46cb67f8c04316860250569921a998c7313005adc

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