Malicious PDF — malware analysis report

Static analysis result for SHA-256 16c1dccd10d8c239…

MALICIOUS

PDF

87.5 KB Created: 2021-07-21 11:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 00e0024cbed33534c55675bc64950d88 SHA-1: ed730f9f834ff18e54017c31b142d8edca56ad7b SHA-256: 16c1dccd10d8c23905cb4c90e39bfa09333985150a53340a75cc01007ad17ace
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to websites hosted on compromised CMS platforms, suggesting a phishing or malicious redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pampa.be/uploads/userfiles/files/59202005792.pdf In PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2a1509f02---suxalopofurew.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/xezakoxula.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5a64ca397---musidizibizofapebukidubo.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/8366786734a279451b0b2aecb7b92c6f/patuzipotox.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160f7124567503---liguzijop.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b46a4b17d1c---pudibimolezukag.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/61o7bbnit096dda1ui07v3k81t/fovedikiwixijoxavededif.pdfIn PDF document text
    • https://csn-alliance.com/data/files/34582501310.pdfIn PDF document text
    • https://ajur.rest/uploads/userfiles/file/81592726157.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/karakokanox.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/23996731036.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160c777fc6eb27---levugazifujibexema.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/952be8e2da4869dee013f223c8e2d897/77699778.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c10b9f1ed1---novamosiduwagirifuniko.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b93d385ec08---75597972442.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/68c1df3dfa50b40735337a88c037b318/jupezagasuwavefawulidod.pdfIn PDF document text
    • http://retailcop.ca/files/rozuzedorogeboxolijupumam.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/88179777900.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/3h8gg9virainonikipv966s684/saditadojodoti.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/44183028673.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/bevokitomare.pdfIn PDF document text
    • http://studiogeologicotrilobite.com/userfiles/files/78767333103.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e5dfdd2d3---65183083350.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=taylor+kitsch+savagesPDF 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_off0000f1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AE 10640 bytes
SHA-256: 7f4026bcb16de0d46544bfe5e622caf313ad11186914b98c9f865f1c879d2345
font_01_sfnt_off00010a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12264 17772 bytes
SHA-256: cfb3f8d354abfb4e1d68c666a00c7b1a77af680b7d1787d8d6a30d47f69644ae

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