Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee59740ebb8a1fe…

MALICIOUS

PDF

39.9 KB Authoring application: OpenOffice.org
MD5: b4279c1a02f70a83317d85ff7e3a92d1 SHA-1: cc949e6c3e2f543c270f908cf87b04e5b98ec5e4 SHA-256: 4ee59740ebb8a1fec3d82bd1cacb04a7437a797a7b55a358316c7c9fff397e0f
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as suggested by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly support the malicious verdict. No scripts were extracted, and the document body content was heavily truncated and unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://vivianmaier.net/uploads/1/3/0/3/130379226/071c7fb45e5.pdf
    • http://chugachpt.com/uploads/1/3/0/6/130622007/ruwubeba.pdf
    • http://mybetterbodycoach.net/uploads/1/3/0/5/130588976/821101.pdf
    • http://indiansoulcollective.com/uploads/1/3/0/8/130874361/7d00502a556.pdf
    • http://mysweettopia.info/uploads/1/3/0/5/130551957/ee8b7477a89194a.pdf
    • http://trendspotr.com/uploads/1/3/0/8/130815664/ab6b23.pdf
    • http://macdesignthinking.com/uploads/1/3/0/4/130488338/puvoluxogi_mapag.pdf
    • http://gayriffic.com/uploads/1/3/0/7/130776591/ce3cf843.pdf
    • http://placesyoullgop.com/uploads/1/3/0/6/130604823/fumijipowi_riwotiraja.pdf
    • http://amitkhare.com/uploads/1/3/0/6/130640104/buwudot.pdf
    • http://www.graylinginvestments.com/uploads/1/3/0/3/130379101/zitezi.pdf
    • http://twogrimsisters.com/uploads/1/3/0/4/130488847/28c1c207fa4.pdf
    • http://drdenisemlowe.net/uploads/1/3/0/6/130640111/tijawo_vefoduxedupinox.pdf
    • http://vpstestsite.com/uploads/1/3/0/7/130739495/9525461.pdf
    • http://christopheraptssparesort.com/uploads/1/3/0/8/130814535/c5dc844de2b.pdf
    • http://simixlaundry.com/uploads/1/3/0/7/130738887/wesimawe.pdf
    • http://nataliegracewagner.com/uploads/1/3/0/5/130543682/6204597.pdf
    • http://www.garhomeofyorkies.us/uploads/1/3/0/5/130543261/d7a9f54c8.pdf
    • http://blackbutterflyplanters.com.au/uploads/1/3/0/6/130620505/7747534.pdf
    • http://naughtybitssoftware.com/uploads/1/3/0/5/130589160/ropawisar.pdf
    • http://nadiafarah.com/uploads/1/3/0/5/130589354/fejuxulomitelodun.pdf
    • http://otherworldlywaxesandwhatever.com/uploads/1/3/0/7/130776105/ziditimimapolud.pdf
    • http://wwickco.com/uploads/1/3/0/5/130543155/b8064b33e.pdf
    • http://hostmaster.kleingarten-davenstedt.de/uploads/1/3/0/8/130814349/8095396.pdf
    • http://adsl-63-204-18-60.benefitplans.org/uploads/1/3/0/5/130590724/130590724.html#alchemical+symbols+earth+element

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000397d.bin
2cd8c0c88ec3f35303f6808ddc50b20dc1f73767970ba92cdcc57b93cb77397c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x397D 7712 bytes

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