Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b026cc955870c47…

MALICIOUS

PDF

57.6 KB Authoring application: Pdftk First seen: 2020-09-24
MD5: 54d4e15dd0b72df66e908bf58a28daf3 SHA-1: fd93f4fbe36188e8e12b4e9f1a5fd53d2b4a81d9 SHA-256: 8b026cc955870c4782645c085b49d93787fd1f474544a1312c8289de696e1b0a
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains a large number of embedded URLs, forming a link farm, which is a common technique for SEO poisoning and phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' directly indicates this behavior. Additionally, the 'SE_LOLBIN_RUN_COMMAND' heuristic suggests that the document may contain instructions for executing commands using Windows scripting tools, potentially to download and execute further payloads. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports the phishing classification.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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://mudgleyholidayhouse.com/uploads/1/3/0/6/130639397/lafaduno.pdf In PDF document text
    • http://ravengroupsf.com/uploads/1/3/0/6/130604769/kujolada.pdfIn PDF document text
    • http://positivecp3.net/uploads/1/3/0/7/130739570/rikipugatu.pdfIn PDF document text
    • http://carmonscurlupanddye.com/uploads/1/3/0/7/130775634/7519745.pdfIn PDF document text
    • http://ohioawnings.com/uploads/1/3/0/3/130324112/f61d73fe.pdfIn PDF document text
    • http://strawberrycookienv.com/uploads/1/3/0/4/130475892/welofepojepir-topepegi.pdfIn macro / runtime command snippet
    • http://reneteassuredtitleagency.us/uploads/1/3/0/4/130483140/5632902.pdfIn PDF document text
    • http://bfreshcreative.com/uploads/1/3/0/4/130488542/4ccf3a5969c.pdfIn PDF document text
    • http://justartborzoi.weebly.com/uploads/1/3/0/6/130620150/xazemumisotugid.pdfIn PDF document text
    • http://heartcentreawareness.com/uploads/1/3/0/5/130550803/7788845.pdfIn PDF document text
    • https://vimabuzitamej.weebly.com/uploads/1/3/0/2/130272937/1a135311.pdfIn PDF document text
    • http://cyclebavaria.com/uploads/1/3/0/8/130813577/130813577.html#let+it+go+violin+sheet+music+pdf+freeIn PDF document text
    • http://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000014c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C9 8876 bytes
SHA-256: 4eff5c8e6abaa53476cc16b0a18d17a6a15c05e6682daa87bbd542c5f9e8171a
font_01_sfnt_off00008c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C14 5136 bytes
SHA-256: deeaaf85cfd6bdef8b811c6ae8560f10166e556517ee3797784f77f617a792c8
font_02_sfnt_off00009bd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BD4 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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