Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d7ebb76572cb9ba…

MALICIOUS

PDF

45.4 KB Authoring application: Solid Converter PDF
MD5: 8039efd194c2f6ad64576472f087303a SHA-1: e4694abc2ec59e293a18475f51bad957d38eac28 SHA-256: 5d7ebb76572cb9bac02df4677cf1b1dcec5c468cb4b509d4c6f4ccc09d430ae0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, which is indicative of SEO spam or a redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, and the document body is heavily obfuscated, making a precise determination of the ultimate payload difficult.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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
  • 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://lavka-med.ru/uploads/2020/01/27/7436859.pdf
    • http://jeanstandmeministries.com/uploads/1/3/0/4/130476587/dutemolabize.pdf
    • http://wuv.horeca-special.ru/uploads/2020/01/27/xujewadavo_dotuzorenu.pdf
    • http://gep.pennystockpromotions.com/uploads/2020/01/27/3631470.pdf
    • http://familytools.ru/uploads/2020/01/27/429495.pdf
    • http://meetthewirths.com/uploads/1/3/0/4/130489175/bokibuw.pdf
    • http://corrtrader.com/uploads/1/3/0/5/130539034/mopizasozumutativ.pdf
    • http://plus-avia.ru/uploads/2020/01/28/ae02a7.pdf
    • https://towovepej.weebly.com/uploads/1/3/0/4/130477839/8082a.pdf
    • http://sellercentral-amazon-avs.com/uploads/2020/01/27/demag.pdf
    • http://laylowtow.com/uploads/1/3/0/2/130289421/46da0b104cf74db.pdf
    • https://najutibewegusu.weebly.com/uploads/1/3/0/3/130379226/3434963.pdf
    • https://nesenajiburuvo.weebly.com/uploads/1/3/0/5/130590059/f63718032ee49.pdf
    • http://riduliw.text-shift.ru/uploads/2020/01/29/ab0eccd.pdf
    • https://jeselexejejofan.weebly.com/uploads/1/3/0/2/130273623/4670146.pdf
    • http://gav.epay-clientesv3-0range.com/uploads/2020/01/28/lakelone.pdf
    • http://mufaket.forst.fun/uploads/2020/01/28/7083547.pdf
    • http://japevu.acupofh2o.net/uploads/2020/01/28/b56822b2809.pdf
    • http://zirefewi.tehnika-asko.ru/uploads/2020/01/29/bulapa-pegokax-wariwumi.pdf
    • http://soj.cabinet-bank.su/uploads/2020/01/27/87b2d4.pdf
    • http://lorepa.garden-centr.ru/uploads/2020/01/28/9696928.pdf
    • http://sobremesasmag.org/uploads/1/3/0/4/130436439/130436439.html#rimworld+orbital+trade+beacon+size
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000015ee.bin
7795436aca131667bf581d1b7a6750c436a0548644d8f9279ec58f7eea4e596f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15EE 8280 bytes
font_01_sfnt_off00006a30.bin
b26ecc3b285394be5ec0344078f7946a75cae1ae1859950a1ab5be2d89b9234d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A30 16092 bytes

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