Malicious PDF — malware analysis report

Static analysis result for SHA-256 1759095cc5aa46ed…

MALICIOUS

PDF

79.8 KB Created: 2021-09-17 23:35:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a97af961cb43af8e5181fefc63ebcadd SHA-1: 3294ebb3d5919bec471a892d2927e1b466e71301 SHA-256: 1759095cc5aa46edeebe7196cfcdadf6150deeabf1931a0dcf0e888c24d03712
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, including one pointing to a raw IP address, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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://philabc.ru/uplcv?utm_term=messenger+lite+2021+apk PDF link annotation
    • https://unique-u.biz/images/uploads/file/numifilakaturuvutop.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/62732989760.pdfIn PDF document text
    • https://excore.hu/ckfinder/userfiles/files/jezekupabesa.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4d9ccd86e---5415936418.pdfPDF link annotation
    • http://sourceandsecure.com/uploads/userfiles/file/kuzozokiwokufebijuvat.pdfIn PDF document text
    • https://homecareangels.ca/files/files/files/29518055650.pdfIn PDF document text
    • http://tuning-zone.eu/userfiles/file/jibekogekozuko.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/6b4d05df85279221ff1c1aab2a5f62b2/41859926233.pdfIn PDF document text
    • https://rossbeede.com/userfiles/file/bixara.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/vuwunijutujevomap.pdfIn PDF document text
    • http://koppeika.ru/userfiles/file/kinitoxeluzikixolakapu.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/tumeneraketefesupeke.pdfIn PDF document text
    • http://mhzsolutionz.com/userfiles/file/sasevetifusuxisev.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/mopivavegaxovokavegagosim.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kusutirogunujanafasisadik.pdfIn PDF document text
    • https://milosislandrooms.gr/userfiles/file/76710847268.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/38283077748.pdfIn PDF document text
    • http://graciaindoutama.com/kingkong/userfiles/files/xisuxidud.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/974b01c6f1c41d707f8dcad3ef005943/79444093183.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/34071631293.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021090307510873499.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/6925066969.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_off0000d36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36F 17672 bytes
SHA-256: a2f4ac723ad0ce18088b150cb955bbce1483daeee956f076c6ca71879d2e6587
font_01_sfnt_off00010121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10121 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11938 10684 bytes
SHA-256: 3b86d76c5867a6213de51a49631438bf751629c8be656689973b3fb917dbdbde