Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2115559b4db68c9…

MALICIOUS

PDF

38.1 KB Created: 2020-03-17 11:32:05 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 8c4f31745d97f5fcc0b526d66f1a5dd8 SHA-1: 132cbd86ac0fdcfb7623b2cd6dd99ec5cb9b7c5f SHA-256: b2115559b4db68c9998428cc2575ecec6d7ad1564c210abb3fa6f046521bf98c
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1218.011 System Binary Proxy Execution: Rundll32 T1218.010 System Binary Proxy Execution: Regsvr32 T1218.005 System Binary Proxy Execution: Mshta

The PDF contains a large number of external links, many pointing to other PDF files, indicative of a link farm or SEO poisoning tactic. The presence of a 'Visible LOLBin command execution instruction' heuristic suggests that the document may contain embedded commands or scripts designed to execute malicious payloads via tools like PowerShell, mshta, rundll32, or regsvr32. The document body itself contains text related to 'database modeling and design' and URLs, reinforcing the lure to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://mcmglobalportal.org/uploads/1/3/0/8/130814062/130814062.html#database+modeling+and+design+logical+design+5th+edition+pdf+free PDF link annotation
    • http://www.paintitaway.com/uploads/1/3/1/0/131070571/6548429.pdfIn PDF document text
    • http://mastindelospirineos.com/uploads/1/3/0/8/130814675/wokulo_jisuk_razumukowaz_voxizerike.pdfIn PDF document text
    • http://nastranskincare.net/uploads/1/3/0/5/130590241/1732583.pdfIn PDF document text
    • http://www.trainedinbritain.com/uploads/1/3/0/5/130540507/4224482.pdfIn PDF document text
    • http://s-p-q.org/uploads/1/3/0/4/130488513/6188913.pdfIn PDF document text
    • http://riccijustisart.com/uploads/1/3/0/6/130604775/e1823.pdfIn PDF document text
    • http://trendysays.com/uploads/1/3/0/6/130604610/2a33ff2800cbf.pdfIn PDF document text
    • http://jgtorresenterprises.com/uploads/1/3/0/5/130538986/6625270.pdfIn PDF document text
    • http://schoolnutritionmenu.com/uploads/1/3/0/8/130813429/kokurobefigemifug.pdfIn PDF document text
    • http://128lumber.com/uploads/1/3/0/4/130489090/651579.pdfIn PDF document text
    • http://www.marilynmonroelegacy.com/uploads/1/3/0/2/130289460/majiza.pdfIn PDF document text
    • http://twistingtrailsandtales.com/uploads/1/3/0/7/130738894/d6d25b83fe33.pdfIn PDF document text
    • http://lenka-photography.com/uploads/1/3/0/5/130540118/dec6de5556b9a.pdfIn PDF document text
    • http://kinrosscurlingtrust.org/uploads/1/3/0/4/130476499/zubamifutoluvob.pdfIn PDF document text
    • http://kgncastings.com/uploads/1/3/0/7/130739344/6954169.pdfIn macro / runtime command snippet
    • http://tristanandrachel.com/uploads/1/3/0/9/130969481/gilixutogopisiweko.pdfIn macro / runtime command snippet
    • http://theurbanmarketsd.com/uploads/1/3/0/6/130604564/rexifizenovaku.pdfIn PDF document text
    • http://anabarragan.com/uploads/1/3/0/5/130539702/02d89906251.pdfIn PDF document text
    • http://oncitynow.com/uploads/1/3/0/6/130605369/c307c6.pdfIn PDF document text
    • http://sisk-security.com/uploads/1/3/0/7/130776895/medutu.pdfIn PDF document text
    • http://www.smartenergychicago.com/uploads/1/3/0/7/130740455/dosabepozoxopod-josaxaze-xifunodubolirem-zuxanigewumizo.pdfIn PDF document text
    • http://miguelsanostory.com/uploads/1/3/0/5/130588605/1623966.pdfIn PDF document text
    • http://michelevevang.com/uploads/1/3/0/6/130622103/fefabetejelavolipuno.pdfIn PDF document text
    • http://www.juliemdesigns.com/uploads/1/3/0/9/130969327/pedizufo_matiririxajib_jazivumuj.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Related samples 2

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_off00006c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C51 7620 bytes
SHA-256: 226a9020298048c18d8e56c0cf1f5e1e7d6d1f84416826e5626154f4de4ddd11

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