Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fd7125d3b0a4c5e…

MALICIOUS

PDF

68.0 KB Created: 2021-09-25 02:23:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fe03585be0d2ae41503f2338d0c7a653 SHA-1: e9f16bef59e4a0fb1265e37138e22a1a36e5e335 SHA-256: 7fd7125d3b0a4c5e143cd11499562d1cb41f17140b3e9ab8428668b8c4d4c81e
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical for phishing or malware distribution, with a high ML classifier score and ClamAV detection. It contains numerous external URIs, including one that appears to be a redirector with UTM parameters, suggesting an attempt to lure users to malicious content. No scripts were extracted, but the presence of external links and the document's structure strongly indicate a malicious intent to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://drafthe.ru/uplcv?utm_term=deadpool+2+online+stream PDF link annotation
    • http://polskienarty.pl/data/aktualnosci_imgs/file/77264474030.pdfIn PDF document text
    • https://alsharqcc.com/userfiles/files/podulikedad.pdfIn PDF document text
    • http://contactfm.be/userfiles/files/43526352316.pdfIn PDF document text
    • https://fiscalonline.ro/app/webroot/files/userfiles/files/ganawevap.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/57916036138.pdfIn PDF document text
    • http://sasolution.kr/userfiles/file/5760356915.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/58165116919.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/xujosoturixal.pdfIn PDF document text
    • https://smartech.lv/sites/smartech/uploads/documents/files/tazizev.pdfIn PDF document text
    • https://arerp.kr/data/file///tinudabumirozej.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/nupoxavorexuvug.pdfIn PDF document text
    • http://sinice-rasy.cz/files/file/dadalezikuluzi.pdfIn PDF document text
    • https://roxracing.eu/userfiles/file/kafenivofoku.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/56199751710.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614c4f8ed7844---92232892857.pdfIn PDF document text
    • http://ctmmaximoravenna.com/ckfinder/userfiles/files/goniwag.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/70731188736.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/8692187520.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161411107f40d3---86395747353.pdfIn PDF document text
    • https://jakspravnenapsa.cz/userfiles/file/veleki.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/pamiwenos.pdfIn PDF document text
    • http://gocchame.vn/app/webroot/img/uploads/files/87193463265.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_off0000ad74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD74 10676 bytes
SHA-256: 5e1d20efb396b560de25e0f4cd258bd58610141d877c09253aa86eac0fd86f63
font_01_sfnt_off0000c5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F0 13896 bytes
SHA-256: 6ce86c0b3fa9a834fabc6ec17122fed8cecf7c0d91a171440b89fb7d0c464c44
font_02_sfnt_off0000e887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE887 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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