Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a6decc6c21ac57…

MALICIOUS

PDF

76.1 KB Authoring application: Poppler-utils
MD5: 86621b6ca9c4b33d99f18e28e3620a45 SHA-1: b8594c59c16196c00f26ea4b655a0509f8bffb0c SHA-256: 11a6decc6c21ac5712ae1a08e2189e25a0bfeda8c53a71828134963945007277
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, indicative of a link farm designed to distribute malware. The heuristic 'PDF_SEO_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' strongly suggest a phishing or malware distribution campaign. The document body, while containing garbled text, also includes several of these malicious URLs, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://okanp.org/uploads/1/3/0/2/130272580/nulose-xalosevegaw-ravujon-nozitus.pdf
    • https://rokujojabage.weebly.com/uploads/1/3/0/5/130589009/nosazufam_jikoreguduwodo_vinotosexegogej.pdf
    • http://mofouad.com/uploads/1/3/0/5/130539912/jisum_tozosazejijavev_norarisubepire.pdf
    • http://artbybelen.com/uploads/1/3/0/2/130291699/5b4938e3af0ed.pdf
    • http://morjana.net/uploads/1/3/0/5/130539033/gimasuzazasam-vosigedere-dajizi.pdf
    • http://newrootscharter.org/uploads/1/3/0/2/130288430/1607849.pdf
    • http://pudorotewi.mindcraftstudio.com/uploads/2020/01/29/5552053.pdf
    • http://tijuanadragones.com/uploads/1/3/0/6/130605044/5eb8acbf18.pdf
    • http://momentumlifecoach.org/uploads/1/3/0/3/130379182/5c3707dde1f8f1.pdf
    • http://thechurchwithamission.com/uploads/1/3/0/2/130271128/8485cb3c2c4.pdf
    • http://best-pokupka5.ru/uploads/2020/01/27/371968.pdf
    • http://mymosaicalphabetbook.com/uploads/1/3/0/3/130323106/logimixiruxedegofade.pdf
    • http://impotenz-selbsthilfe.site/uploads/2020/01/29/fce5f9.pdf
    • http://heartsofpaw.com/uploads/1/3/0/6/130604207/6956341.pdf
    • https://sowowufakumoju.weebly.com/uploads/1/3/0/6/130604456/gowebetakominu_wuroxenurege_xedivebopekogot.pdf
    • http://nujiju.site111.ru/uploads/2020/01/28/6491387.pdf
    • http://policetrailer.com/uploads/1/3/0/5/130588213/130588213.html#sap+material+requirement+planning+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000015ae.bin
b5f8f05ccf3e3cc0fb7f308ed5573026a1fb5567feede4e676fb175116d40ee8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15AE 8252 bytes

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