Malicious PDF — malware analysis report

Static analysis result for SHA-256 f08580f82bd328bc…

MALICIOUS

PDF

44.1 KB Authoring application: PDFedit
MD5: b533c2082121cd538759e22d751d0cd3 SHA-1: 9693e5219c829352006fadb6cc4ba472ef5e64eb SHA-256: f08580f82bd328bcbfd125dcfe67acb6247d40bdad5133f4f87f914f82e14115
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body itself is largely unreadable but contains some of the URLs, reinforcing the link-farming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuxisa.grink.icu/uploads/2020/01/28/1882676.pdf
    • http://michaelpaulustraining.com/uploads/1/3/0/2/130287257/03e97981.pdf
    • https://vezitukub.weebly.com/uploads/1/3/0/2/130289663/4990923.pdf
    • http://sanijok.kuprygin.com/uploads/2020/01/29/pomevula.pdf
    • http://mailliesemp.com/uploads/1/3/0/2/130271116/vakaguxisudu.pdf
    • http://yourspecialchef.weebly.com/uploads/1/3/0/6/130621135/wikilekora.pdf
    • http://damouretdesucre.com/uploads/1/3/0/5/130590431/botoviwel.pdf
    • http://juvimujuka.galaxycom.ru/uploads/2020/01/27/9341499.pdf
    • http://angiessoulspace.com/uploads/1/3/0/4/130435895/zekasukenosubase.pdf
    • http://moms-life.net/uploads/1/3/0/5/130551684/nanile-jegugatujume.pdf
    • http://bagakewiwo.melikset.ru/uploads/2020/01/28/5f791.pdf
    • http://turpinenterprises.com/uploads/1/3/0/4/130483146/3359121.pdf
    • http://sunsetsailkeywest.net/uploads/1/3/0/6/130604635/zetuj_zogodalir_rasedasifoxe.pdf
    • http://fodu.forst.fun/uploads/2020/01/27/b40db7ccbb282c7.pdf
    • http://gizojefu.artmexicano.online/uploads/2020/01/29/lafisidasu.pdf
    • https://jugozukasunuz.weebly.com/uploads/1/3/0/5/130540037/b401ec4c2b62b.pdf
    • http://radiancebeautybytara.com/uploads/1/3/0/2/130270781/9916151.pdf
    • http://nutritionunique2u.com/uploads/1/3/0/6/130639861/5f2fe0a0a0ed.pdf
    • http://djcorto.com/uploads/2020/01/27/sixamosif.pdf
    • http://tcca.shop/uploads/1/3/0/2/130291783/sobawofela-xupovin-fifalafewoken-bezetevid.pdf
    • http://dugudu.cgt-capgemini-ts.net/uploads/2020/01/27/boxijo.pdf
    • http://fovepexiwo.rucrime.top/uploads/2020/01/29/ba398.pdf
    • http://nationalriskmanagementgroup.com/uploads/1/3/0/6/130622048/130622048.html#chhaila+bihari+all+song

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00005229.bin
de133fb68d74d567586d4475e82fdd498e1ecc3768a0d8b3d5973010cca8a605		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5229 19680 bytes
font_00_sfnt_off00001612.bin
1598b857f0928cb150226db0fe3d2ec7fb7dce782f5c3618e078163af2bbb5b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1612 7516 bytes
font_02_sfnt_off0000704a.bin
1b3f82cd74c5b6671cc0c0d4a6c7877b74bb57ca469b2a61ef541918e41af838		 pdf-font-stream PDF embedded font (sfnt) at offset 0x704A 2652 bytes

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