Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e4a544d908148d…

MALICIOUS

PDF

56.3 KB Authoring application: OpenOffice Draw First seen: 2020-09-24
MD5: 46e1a5144b63dba983c43b989a7551bd SHA-1: 7dc7731b82d0344bab826783da33af6c8509a8a0 SHA-256: d8e4a544d908148d20368379eb83dbf76de72cd7f925fc4cf09c76b0701c6012
200 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various external PDF files. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the presence of embedded URLs strongly suggest a phishing or malware distribution campaign. The document body, though heavily obfuscated, also contains several of these suspicious URLs, reinforcing the lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://buxe.gost-stroy.com/uploads/2020/01/28/b46d6853.pdf In PDF document text
    • http://gou-spo-mit.ru/uploads/2020/01/27/risiwuwipomosid-babenupolijo.pdfIn PDF document text
    • http://wellsonlineserviceverifications.biz/uploads/2020/01/27/9953790.pdfIn PDF document text
    • https://bagirenem.weebly.com/uploads/1/3/0/6/130605028/levelevetemajemu.pdfIn PDF document text
    • https://wetukaginowup.weebly.com/uploads/1/3/0/4/130488661/7304193.pdfIn PDF document text
    • http://xegetoniso.tricolor-oplata.online/uploads/2020/01/27/2046fa437.pdfIn PDF document text
    • http://job.sell-video.ru/uploads/2020/01/29/1660290.pdfIn PDF document text
    • http://fadunagik.melikset.ru/uploads/2020/01/28/ramexaga.pdfIn PDF document text
    • http://indmovieonline.club/uploads/2020/01/27/wimurowid.pdfIn PDF document text
    • http://xikara.botanicart.ru/uploads/2020/01/28/dozawuvaxixo.pdfIn PDF document text
    • https://kagumolat.weebly.com/uploads/1/3/0/2/130289466/panujikerog.pdfIn PDF document text
    • http://nafaxixam.vet77.ru/uploads/2020/01/27/05bc91be17437.pdfIn PDF document text
    • http://powojuka.regpanel.club/uploads/2020/01/28/tuzujimijobavem_lodox_gazoluxoxu_kefuxazekit.pdfIn PDF document text
    • http://vofewe.pknovitek.ru/uploads/2020/01/28/1363818.pdfIn PDF document text
    • http://xeromej.zayavka-na-kredit.com/uploads/2020/01/27/7935792.pdfIn PDF document text
    • http://wigo.urlmac.com/uploads/2020/01/27/mimakemiserufeti.pdfIn PDF document text
    • http://gadia.info/uploads/1/3/0/5/130540554/ed5845918634e15.pdfIn PDF document text
    • http://lucaazzurro.com/uploads/1/3/0/4/130483741/xanufufurowin-zozatiwokofatoj-tilunuxaladafe-pegubarudarapip.pdfIn PDF document text
    • http://bimigoz.joeyguarino.com/uploads/2020/01/29/jabixinakesarozo.pdfIn PDF document text
    • http://varukepak.molleo.in/uploads/2020/01/28/ludulesameraza_visiwi_xobewezafapivuv_wukipofer.pdfIn PDF document text
    • http://gaj.gromovfood.ru/uploads/2020/01/28/wetotawalo.pdfIn PDF document text
    • https://vekuwixikapip.weebly.com/uploads/1/3/0/4/130488442/kagedezulabefasiluto.pdfIn PDF document text
    • https://jisuxekam.weebly.com/uploads/1/3/0/5/130590278/1030387.pdfIn PDF document text
    • https://rimepelovepag.weebly.com/uploads/1/3/0/4/130492315/tozos.pdfIn PDF document text
    • http://victorycc.org/uploads/1/3/0/2/130287946/gufap.pdfIn PDF document text
    • http://kofc6065.org/uploads/1/3/0/6/130620249/130620249.html#the+automatic+millionaireIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: lucaazzurro.com 3 samples

Related samples 8

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Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00008919.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8919 21296 bytes
SHA-256: 7c650f25fcb57831f9658ee36e5ac56d6072259e55e5e50816b8bbe45fe7d010
font_00_sfnt_off00001831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1831 9376 bytes
SHA-256: 31aa76885b72f58153f9019a51f4ab249f3a2d59da4afe400812d69a167c28f6

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