Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3368e63760379fb…

MALICIOUS

PDF

45.5 KB Authoring application: Nitro PDF First seen: 2020-05-25
MD5: 725af4b85703584580f6e5175a7c4400 SHA-1: 3c61ed9d909666b984134f6cb61b3af68311952d SHA-256: a3368e63760379fbd1ab8439f55d68c9c92cf0a8917dbb1b5962db3ac150c334
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

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 payloads. The ClamAV heuristic 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the 'PDF_SEO_LINK_FARM' heuristic strongly indicate a phishing or malicious redirection campaign. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

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://unbreakablechampionship.weebly.com/uploads/1/3/0/3/130379843/mezazilam_sejidanofi_pirokekujunuzik.pdf In PDF document text
    • http://mafibi.webreseller.ru/uploads/2020/01/29/vamedagozoko.pdfIn PDF document text
    • http://cofrefinanciero.com/uploads/1/3/0/6/130639464/mejiludabijugu_maweduliro.pdfIn PDF document text
    • http://ramblinghouseshow.com/uploads/1/3/0/4/130476048/0b4af41b9c.pdfIn PDF document text
    • http://robu.najiyagalimova.com/uploads/2020/01/28/248223.pdfIn PDF document text
    • http://cjsgarden.org/uploads/1/3/0/3/130313190/tebalev_lifowunaki.pdfIn PDF document text
    • http://azarenkosergey.com/uploads/2020/01/28/d8d20080.pdfIn PDF document text
    • http://lrg.ky/uploads/1/3/0/6/130639347/ee29d742cad6dda.pdfIn PDF document text
    • http://lawncarebenton.com/uploads/1/3/0/5/130589252/mulat.pdfIn PDF document text
    • http://wunisotixi.betterqualityreviews.com/uploads/2020/01/28/9641311.pdfIn PDF document text
    • http://moorestownlegendslax.com/uploads/1/3/0/6/130621665/1dc21.pdfIn PDF document text
    • http://northhaledontreeexperts.com/uploads/1/3/0/6/130604492/vejefavisoxe.pdfIn PDF document text
    • http://sutew.smokerate.ru/uploads/2020/01/27/55189b6142.pdfIn PDF document text
    • http://themalibubuilder.com/uploads/1/3/0/4/130476885/1112313.pdfIn PDF document text
    • https://ronojanakut.weebly.com/uploads/1/3/0/4/130436224/vuxeporiseb.pdfIn PDF document text
    • http://libertygraphicsok.com/uploads/1/3/0/4/130483354/lokada.pdfIn PDF document text
    • http://ronomusadi.rstuff.xyz/uploads/2020/01/29/9850838.pdfIn PDF document text
    • http://mikemooers.com/uploads/1/3/0/6/130621461/4253440.pdfIn PDF document text
    • http://crosleyoutdoorproducts.com/uploads/1/3/0/2/130271128/88e757.pdfIn PDF document text
    • https://monokagixajazo.weebly.com/uploads/1/3/0/6/130604625/3559833.pdfIn PDF document text
    • http://mycubbylife.com/uploads/1/3/0/4/130436058/doxogaza.pdfIn PDF document text
    • http://gemozukid.chungthanhnien.com/uploads/2020/01/28/fopidoduvoniparotev.pdfIn PDF document text
    • http://nadinelambert.com/uploads/1/3/0/4/130476143/raperovanobizominu.pdfIn PDF document text
    • http://petrapreschool.net/uploads/1/3/0/6/130621345/4632833.pdfIn PDF document text
    • https://kisekuzamuxu.weebly.com/uploads/1/3/0/3/130324420/zowuroxino.pdfIn PDF document text
    • http://doylestownbotox.com/uploads/1/3/0/6/130604737/130604737.html#ice+sheets+melting+affectIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000175f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175F 8128 bytes
SHA-256: 72e4b712410c0d1cc9e534c1d2ab854326217f730d3ad2ce326d164ce541c93f
font_01_sfnt_off00006977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6977 16268 bytes
SHA-256: 5d7ebd720715cd86529581f1d40cc643f68465477bd430d4be5ff736bc95f798

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