Malicious PDF — malware analysis report

Static analysis result for SHA-256 87658012f943e94f…

MALICIOUS

PDF

41.9 KB Authoring application: Nitro PDF First seen: 2020-09-24
MD5: 4b9629adba46414cbbe0079a047d8f06 SHA-1: 1b14f6e3067547153055ae407a30c4a0534438dc SHA-256: 87658012f943e94fbc59ec0c0ca83ca1115705b6485a374fff8640282f5292ba
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The file contains a large number of embedded URLs pointing to external PDF documents hosted on various domains, suggesting a link farm or a method to distribute further malicious content. The presence of 'LOLBin token sequence' and the ML classifier output further support its malicious nature. No scripts were extracted, but the overall pattern indicates a phishing or content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://lgj.de/uploads/1/3/0/3/130313177/firakinik-lejarimida.pdf In PDF document text
    • http://bucharestinthebeltway.com/uploads/1/3/0/3/130323092/bipujunu-tiwaw.pdfIn macro / runtime command snippet
    • http://4frontresidency.com/uploads/1/3/0/2/130289632/godabub.pdfIn PDF document text
    • http://scipromath.net/uploads/1/3/0/6/130639181/1391242.pdfIn PDF document text
    • http://hostmaster.londonimagingnetwork.com/uploads/1/3/0/8/130873954/pigudufejalizabexof.pdfIn PDF document text
    • http://perstaxllc.com/uploads/1/3/0/7/130740178/23e0eb6.pdfIn PDF document text
    • http://fsq.me/uploads/1/3/0/6/130639856/gedakewijawivuv.pdfIn PDF document text
    • http://belkran-bk.com/uploads/1/3/0/6/130639807/a6bf97b81.pdfIn PDF document text
    • http://americalibertyforum.com/uploads/1/3/0/5/130589400/be9df8e73.pdfIn PDF document text
    • http://qijidaoyin.net/uploads/1/3/0/7/130776307/aeb3e3.pdfIn PDF document text
    • http://jordanqualls.info/uploads/1/3/0/6/130621614/5088557.pdfIn PDF document text
    • http://bookerteesmore.com/uploads/1/3/0/7/130776756/375383ac83840.pdfIn PDF document text
    • http://scandinavian-relocationgroup.com/uploads/1/3/0/2/130291783/padowubabuwo.pdfIn PDF document text
    • http://globalstrangers.com/uploads/1/3/0/4/130483191/jituxan_dulejudufajur.pdfIn PDF document text
    • http://mormon-clothes.com/uploads/1/3/0/6/130639629/e398fbec309710.pdfIn PDF document text
    • http://auditionhell.com/uploads/1/3/0/6/130604758/7089534.pdfIn PDF document text
    • http://copeid.com/uploads/1/3/0/6/130639652/3344967.pdfIn PDF document text
    • http://austincrouch.info/uploads/1/3/0/6/130620955/wubelofifofil.pdfIn PDF document text
    • http://scandinavian-relocation.com/uploads/1/3/0/5/130551103/766d3.pdfIn PDF document text
    • http://biggestbenefit.com/uploads/1/3/0/7/130776077/7286276.pdfIn PDF document text
    • http://broketheinterweb.com/uploads/1/3/0/5/130588674/wuwobanek.pdfIn PDF document text
    • http://loveisthewayhome.com/uploads/1/3/0/4/130483515/simimoxuvaxove-xatetom-rurolulosinojon.pdfIn PDF document text
    • http://carolegelkerartist.info/uploads/1/3/0/3/130324206/62feb0a3a184.pdfIn PDF document text
    • http://christani.info/uploads/1/3/0/2/130274146/bizozikoxuxiwur.pdfIn PDF document text
    • http://xtwdn6.brdge.org/uploads/1/3/0/9/130968997/130968997.html#aviation+english+vocabularyIn PDF document text
    • http://lgj.de/uploads/1/3/0/3/13031317In macro / runtime command snippet
🗂 Part of campaign: auditionhell.com 6 samples

Related samples 3

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_off0000428a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x428A 7364 bytes
SHA-256: 5481b842dfc510b8c52b1a59249d1bc271f2cacda66eeb21051383c3cabe96c5

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