Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14ecb4e4ebde0c7…

MALICIOUS

PDF

82.2 KB Created: 2021-09-07 09:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a4ce7a2efff5540000cbcf436080b388 SHA-1: e518e41cdced6e364601697d352d14e5f33d95f6 SHA-256: c14ecb4e4ebde0c71495987ff863eb6009a2df49b0be6aa19f79614dc995d20f
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Numerous embedded URIs were found, with several pointing to potentially malicious domains and one directly to an IP address, indicating a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further suggests a link farm designed for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://smartvoicecom.com/userfiles/jilalub.pdf In PDF document text
    • https://beaszemin.com/files/xibomeduzonapunaliwenawof.pdfIn PDF document text
    • https://fivetc.vn/uploads/files/22618698276.pdfIn PDF document text
    • http://rioairporttransfer.com/ckfinder/userfiles/files/pipimokorifapetiko.pdfIn PDF document text
    • http://glassick.com/userfiles/file/rororidukekar.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/bepoluvizimewow.pdfIn PDF document text
    • http://navigator-nsk.ru/userfiles/file/fokipijenapobe.pdfIn PDF document text
    • https://viscom.bg/uploads/wysiwyg/files/duwogulavenogidipurasaxo.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/gepapogigizubozam.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b93190462d---tilabemunodin.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/madumopanafototavasu.pdfIn PDF document text
    • http://dongzzang.com/userfiles/file///46092389423.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/93035504387.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/mivirujaxabefodapidadafa.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c96230a09a5---returabukuvuwa.pdfPDF link annotation
    • https://istanajpdua.com/contents//files/wafegawupugigatadutiwixi.pdfIn PDF document text
    • http://envigest.cz/upload/file/xubobugizizorixibusu.pdfIn PDF document text
    • https://vettercycles.ch/userfiles/files/zozubiwuperasawipedu.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/gijevaxodijegirasiwose.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/83717379239.pdfIn PDF document text
    • https://nhanloc.net/userfiles/file/59701002246.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/97393452586.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f0aa91622---natewa.pdfIn PDF document text
    • https://7gking.tw/upload/files/pasuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=historia+de+los+cocteles+clasicos+pdfPDF 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_off0000da7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7E 19232 bytes
SHA-256: e646c238112518c6de0b326e4f269faca39ec832352865c2ca1324d25fc23af9
font_01_sfnt_off00010ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADA 10500 bytes
SHA-256: fbe214dd8b05ca61306d7938094209213787e5a0e5ea94308145b81991a840f9
font_02_sfnt_off000122d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1