Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1f040e179cccf2…

MALICIOUS

PDF

85.4 KB Created: 2021-09-14 02:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5b89ad1f9e1251b0ba9a5ea961f6e950 SHA-1: 895d8b83d07ed835bf86516073ab1d7b81ad4425 SHA-256: 3d1f040e179cccf2cba51606e9c3989f2c9d3a1220141d76aa9d2e0c335f415b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The presence of numerous external URIs, many on disposable hosting, strongly suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and numerous links indicate an intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 https://laborke.ru/uplcv?utm_term=aurora+hdr+apk PDF link annotation
    • https://foodvellythailand.com/upload/files/69528191621.pdfIn PDF document text
    • http://parkety-patemal.sk/files/file/50966516947.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d8f413138---bogikumemijamuwejuzosup.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/28603410882.pdfIn PDF document text
    • https://fullprotec.com/ckfinder/userfiles/files/jaxuximevinufururo.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-12/20210912050028406020.pdfIn PDF document text
    • http://concilianavarra.com/userfiles/files/8457075736.pdfIn PDF document text
    • https://solelane.com/ckfinder/userfiles/files/mexode.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/f7d062b80cbadb6f757480b861772075/xobonakusesosoxux.pdfIn PDF document text
    • https://seas2010.cienciaevida.pt/site/upload/file/xekubafagozinatitamo.pdfIn PDF document text
    • http://chiangmai-esc.net/user_img/files/86435759858.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210908215746_ha26s2.pdfIn PDF document text
    • http://houtackers.nl/userfiles/file/lutupisozed.pdfIn PDF document text
    • https://saigonservices.vn/images/uploads/files/mivefexafes.pdfIn PDF document text
    • http://hongsung114.com/files/fckeditor/file/rixolanagigowu.pdfIn PDF document text
    • http://baschin-heizung.de/meineBilderAlbertGrundschule/file/vexasikarubumopif.pdfIn PDF document text
    • http://destockbaby.com/ckfinder/userfiles/files/figewalumiserozidawo.pdfIn PDF document text
    • https://caror.hu/ckfinder/userfiles/files/fefapugoxiremupur.pdfIn PDF document text
    • http://oishisushigd.com/uploads/files/tadovusovor.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/32084079627.pdfIn PDF document text
    • http://bosch-elektronarzedzia.pl/catalog/file/xegovusasixi.pdfIn PDF document text
    • https://menu2uplus.com/images/file/fofigir.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_off0000ebcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E1 18000 bytes
SHA-256: b636754dadc381a6aceb2fd4f81bf350620d0d9f519a50f95f2ff651e556f514
font_02_sfnt_off0001327e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1327E 10020 bytes
SHA-256: 039ee64565ed02f21a59b35027d56ede1c1debcc83dba1afb21c51567c7f854d

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