Malicious PDF — malware analysis report

Static analysis result for SHA-256 81a7f87da5139946…

MALICIOUS

PDF

38.8 KB Authoring application: LibreOffice Draw First seen: 2020-07-24
MD5: 4e3b5a186763e6d80d053613f7bf4f50 SHA-1: a66b9700b57f1712cceffb47e775d2301e5342df SHA-256: 81a7f87da5139946292120ea0eddc21e5a4a657ee5262c76b61ddac5fdac2149
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, which is indicative of a phishing or malicious content distribution scheme. The ML classifier and ClamAV detection further support its malicious nature. The primary goal appears to be directing users to download other malicious PDF files from various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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://experienceperfectwindows.com/uploads/1/3/0/5/130590400/f46147ef.pdf In PDF document text
    • https://bipidutir.weebly.com/uploads/1/3/0/5/130588620/d139b5c12c7c.pdfIn PDF document text
    • http://ramufa.onemagazin.ru/uploads/2020/01/28/wafojujetilodo.pdfIn PDF document text
    • http://futabiv.evroplast92.ru/uploads/2020/01/27/kuzuxomerepep.pdfIn PDF document text
    • http://sew.freepubg.shop/uploads/2020/01/28/wiwirur.pdfIn PDF document text
    • http://win.graf-von-eichendorff.online/uploads/2020/01/28/323c0752cf4.pdfIn PDF document text
    • http://lilubeauty.com/uploads/1/3/0/4/130483842/7671175.pdfIn PDF document text
    • https://kisozebiduz.weebly.com/uploads/1/3/0/5/130589019/3568008.pdfIn PDF document text
    • https://rafapabofog.weebly.com/uploads/1/3/0/5/130590420/jitala_samusajokaf_lijekijadam_detefatumuwoxe.pdfIn PDF document text
    • http://nigewofok.almet-centr.ru/uploads/2020/01/28/4089011.pdfIn PDF document text
    • https://rativoneku.weebly.com/uploads/1/3/0/2/130287495/a1ec35b86d.pdfIn PDF document text
    • http://rickgillammobileservice.com/uploads/1/3/0/6/130620549/68648.pdfIn PDF document text
    • http://vowuvu.krokus-avto.ru/uploads/2020/01/28/jifebuzovarurunuj.pdfIn PDF document text
    • http://jag.cmb-contact.com/uploads/2020/01/27/b9b71bf2f8.pdfIn PDF document text
    • http://zowegub.propiedadesfibrastextiles.com/uploads/2020/01/27/1321872.pdfIn PDF document text
    • http://gotu.angrybirds.tech/uploads/2020/01/27/faf157d7.pdfIn PDF document text
    • http://hamptonsbailbonds.com/uploads/1/3/0/3/130323936/borukedetomizod-fililuduruv-nowovorelupiv-nukozuxoxakebor.pdfIn PDF document text
    • http://jinig.good-robot.ru/uploads/2020/01/29/tewun_funeju_jedobef_visetog.pdfIn PDF document text
    • http://speacetech.us/uploads/2020/01/28/561d2a6ab6f.pdfIn PDF document text
    • https://rimenanamor.weebly.com/uploads/1/3/0/2/130289448/gudamol.pdfIn PDF document text
    • https://sadumodu.weebly.com/uploads/1/3/0/4/130488331/folejuxajenev_bowut_wulesetufebutes.pdfIn PDF document text
    • http://vehicleloanusa.com/uploads/1/3/0/5/130543472/1a6491.pdfIn PDF document text
    • http://xegaxuzinu.tkantares.ru/uploads/2020/01/27/33d67d19.pdfIn PDF document text
    • http://cafeconyoga.com/uploads/1/3/0/6/130604230/f73b9.pdfIn PDF document text
    • https://vifixevefigewux.weebly.com/uploads/1/3/0/4/130489564/pimibuxaralik.pdfIn PDF document text
    • http://varsitygreekstore.com/uploads/1/3/0/5/130545884/130545884.html#counter+strike+1.+5+ekran+b%C3%BCy%C3%BCtmeIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000019fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19FE 9592 bytes
SHA-256: 85a2ca91145e6a56f3cc044e947c11080e5417f2675c9c38c2d7700eef30ee84

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