Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ba1a9535f36884…

MALICIOUS

PDF

92.0 KB Authoring application: Poppler-utils
MD5: e5ee85ab5c1952357d3aeadda49241b1 SHA-1: b271051e515eeb13dbd6d01d22e7767236adcff7 SHA-256: 61ba1a9535f368842bb18a6ec5f64944dd68287f6cb8391945460fe5646b8adb
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. The document body itself is largely unreadable due to encoding issues, but the presence of numerous external links is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://tentmakers.co/uploads/1/3/0/4/130491001/3520358.pdf
    • http://countrymilehotdogs.net/uploads/1/3/0/7/130775118/gejalinovep.pdf
    • http://swingfun.com/uploads/1/3/0/8/130874066/josis-dulewazamuzeb.pdf
    • http://glamourebeauty.com/uploads/1/3/0/7/130738830/553784ee865a9.pdf
    • http://globallutheranoutreach.biz/uploads/1/3/0/6/130620854/daloxadomozupaboxib.pdf
    • http://ejruek.com/uploads/1/3/0/8/130873843/cfbfc5.pdf
    • http://myburnsfamily.com/uploads/1/3/0/5/130539637/82a65820917.pdf
    • http://musicstockphoto.com/uploads/1/3/0/5/130590229/01a5d07d153e30.pdf
    • http://jackieheere.com/uploads/1/3/0/8/130813979/vubuvefutoxut_julogakisok_luwovotuwopufu.pdf
    • http://noirnooga.net/uploads/1/3/0/3/130323811/4609583.pdf
    • http://alfredveretto.com/uploads/1/3/0/6/130621608/tabutevikil.pdf
    • http://snlgi.com/uploads/1/3/0/6/130639571/947d28a1c1a3934.pdf
    • http://analyticsforsocialgood.com/uploads/1/3/0/5/130588550/niveravavamixo.pdf
    • http://antiochmissionarybaptist.org/uploads/1/3/0/8/130813848/5052503.pdf
    • http://extractvaluenow.com/uploads/1/3/0/2/130291373/6512465.pdf
    • http://carolinaopticalbluffton.com/uploads/1/3/0/3/130313513/losizuranitasujuz.pdf
    • http://processly.com/uploads/1/3/0/7/130775228/0634f7756a9.pdf
    • http://kateforester.com/uploads/1/3/0/5/130551772/4311834.pdf
    • http://www.masterscookware.com/uploads/1/3/0/2/130289460/3349612.pdf
    • http://seasonalswap.com/uploads/1/3/0/8/130814729/rotafejo.pdf
    • http://delbuck.com/uploads/1/3/0/6/130603850/5625946.pdf
    • http://debudgetheer.nl/uploads/1/3/0/5/130539002/f9291.pdf
    • http://jy-la.org/uploads/1/3/0/7/130739978/padodakewaf_geluke_poruk_vegex.pdf
    • http://balkanco.com/uploads/1/3/0/7/130738646/6486970.pdf
    • http://hvo48.slpny.com/uploads/1/3/0/6/130621682/130621682.html#hindi+font+kruti+dev+keyboard+chart
    • http://fedorahosted.org/lohit
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000941c.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x941C 16036 bytes
font_01_sfnt_off0000a832.bin
1723f1ced37cc89d69e30f3df6281c5e5fb8989544fd4587aa75b00c91af2fd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA832 1388 bytes
font_02_sfnt_off0000b340.bin
e61de68305cbe0e2bf78d404896e0117bd41255bb6fb35433242f72eed9e0904		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB340 20092 bytes
font_03_sfnt_off0000eb40.bin
f0a4bbe5d70dd89e37e961fccc7002a23760ab8a9969b0dcb85bf166cd2220a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB40 22900 bytes

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