Malicious PDF — malware analysis report

Static analysis result for SHA-256 74a3f4133c9f47db…

MALICIOUS

PDF

79.7 KB Created: 2021-09-12 20:45:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4bedf371c3530582fda63ff2dbac9084 SHA-1: be946b09b6531733adc440372c7953e52872366b SHA-256: 74a3f4133c9f47db2f2840f645371a90ab4a0329dee1356dd9c2cebf169e085b
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple external URIs and a raw IP address pointing to suspicious domains, indicating an attempt to redirect the user to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URI heuristics point towards exploitation or redirection techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://oniceh.ru/uplcv?utm_term=hack+my+talking+angela+apk PDF link annotation
    • http://usatovl.ru/upload/fckeditorfile/rajizujerituva.pdfIn PDF document text
    • https://e-ssuances.com/ckfinder/userfiles/files/7983454998.pdfIn PDF document text
    • http://gz-chengeng.com/uploadfile/files/rujoviz.pdfIn PDF document text
    • http://crm333.com/documentos/file/parurusigos.pdfIn PDF document text
    • https://dm288.com/slicice/file/werodi.pdfIn PDF document text
    • https://ww150002.linebot.net/upfile/files/20210905131309.pdfIn PDF document text
    • http://ambulatorioveterinariorigolon.eu/userfiles/files/95304440023.pdfIn PDF document text
    • http://turksebruiloften.nl/userfiles/file/26264267227.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/12823025635.pdfIn PDF document text
    • https://bitree.ru/ckfinder/userfiles/files/sukobovozogakek.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/sotadalaxexakot.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/76e116cd7d9bb33c58f5edc2ab8a3f8d/voxirebi.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/jasajanezidukudaserape.pdfIn PDF document text
    • http://finalbrand.cz/upload/file/kotidibuzinag.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/nukebo.pdfIn PDF document text
    • http://devitohomesorlando.com/userfiles/files/guzabivusanebenanejegixer.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/89390977188.pdfIn PDF document text
    • https://tranhdaquyhn.com/uploads/news_file/37893398574.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139272e08a93---radow.pdfPDF link annotation
    • http://ryanoomen.nl/uploadimages/files/sevamazebugofexunufe.pdfIn PDF document text
    • https://indoshaolinkungfusociety.com/ckfinder/userfiles/files/vexafenefusakukasalaxat.pdfIn PDF document text
    • http://rulada.by/upload/editor/files/34710368932.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/161322163ced2c---doresexonutovomebi.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/misobawir.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_off0000d03b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03B 10524 bytes
SHA-256: 7c2448557479dbf27175876a478844929e7dd334d821e05cf083f9bfca59eeee
font_01_sfnt_off0000e822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE822 19280 bytes
SHA-256: e9e5f771d71d659a28a3e9b130aac16901d841ca6c77985f5f28148ecd6290d6
font_02_sfnt_off00011969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11969 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1