Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe0e790c73ef87e…

MALICIOUS

PDF

38.0 KB Created: 2020-05-15 09:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 9cc98b38033bf34af47c7d70abdbde8f SHA-1: 12deca2252505bd740d7a99f41b0733edac0610d SHA-256: bfe0e790c73ef87e1df4307edbdbf68a2d55158acca23f1d539342c6789724d9
136 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The embedded URLs point to various domains, suggesting a link farm or a distribution network for malicious content. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine a specific user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://entrepreneurssuccessformula.com/uploads/1/3/0/7/130739764/130739764.html#python+string+format+escape+curly+brackets PDF link annotation
    • http://npsvs.com/uploads/1/3/0/5/130544468/6e9f168844.pdfIn PDF document text
    • http://faszination-gewalt.com/uploads/1/3/0/2/130271042/ac33f262d30eb.pdfIn macro / runtime command snippet
    • http://caryfamilycounseling.com/uploads/1/3/0/9/130969406/sumetagun_godoleweviboru.pdfIn PDF document text
    • http://runciblespoonjam.com/uploads/1/3/0/3/130313729/5985608.pdfIn PDF document text
    • http://followthewhiterabbitonline.com/uploads/1/3/0/3/130379146/1df7b.pdfIn PDF document text
    • http://kidandamen.com/uploads/1/3/0/5/130551103/famisenitazugokixoz.pdfIn PDF document text
    • http://gridwize.com/uploads/1/3/0/5/130589241/pebexogunubilele.pdfIn PDF document text
    • http://time4thepast.com/uploads/1/3/0/7/130776616/5979636.pdfIn PDF document text
    • http://jwsolutionsgroup.com/uploads/1/3/1/6/131606155/7697157.pdfIn PDF document text
    • http://megankeetley.com/uploads/1/3/0/8/130813866/8099757.pdfIn PDF document text
    • http://candmcreations.com/uploads/1/3/0/6/130605016/37e344.pdfIn PDF document text
    • http://happywrappysg.com/uploads/1/3/1/0/131070382/zipekaxalutesupu.pdfIn PDF document text
    • http://cotationmultiassurance.ca/uploads/1/3/1/8/131856619/gimatoxaluleg.pdfIn PDF document text
    • http://ronibeauty.com/uploads/1/3/1/6/131636719/8330932.pdfIn PDF document text
    • http://aldicommunitygames.ie/uploads/1/3/0/5/130539676/bokazu.pdfIn PDF document text
    • http://garciaspinecenter.net/uploads/1/3/1/4/131407537/6882ba8.pdfIn PDF document text
    • http://roofingcedarhill.com/uploads/1/3/0/5/130551239/tirosazokuzamax-duzopaf-gekibupewaro.pdfIn PDF document text
    • http://helplive.me/uploads/1/3/1/4/131406925/duxilata_werorezif_fokarunozodurev.pdfIn PDF document text
    • http://kryanjenkins.com/uploads/1/3/0/7/130740015/7730069.pdfIn PDF document text
    • http://npsvs.com/uploads/1/3/0/5/130544468/6eIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 6

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_off00006570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6570 11788 bytes
SHA-256: 1d9bbed1c194df1c56f5c1a6ec0bf9c79ae728ea43c80c517f1de735eabb17cc

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