Malicious PDF — malware analysis report

Static analysis result for SHA-256 2048ea21191cf19d…

MALICIOUS

PDF

46.2 KB Created: 2020-04-07 09:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: e39c2cfba1ca1ea7bfa47fee6d3ac487 SHA-1: cd60d85c3200b4d8a66cb92e1835dba962778916 SHA-256: 2048ea21191cf19dff0350a3821e1d5a41e77404cef08c87ae54f1c06e5c3c59
176 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1059 Command and Scripting Interpreter T1059.003 Command and Scripting Interpreter: Windows Command Shell T1059.001 Command and Scripting Interpreter: PowerShell

The PDF document contains a social engineering lure, specifically a 'ClickFix' attack, to trick the user into executing commands. It presents a fake problem with Excel formulas and instructs the user to press Win+R or paste a command into a terminal, likely to download and execute a second-stage payload. The document also contains a link farm of external PDF files, suggesting a broader distribution or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://strandcc.net/uploads/1/3/0/7/130776887/130776887.html#copy+paste+formula+in+excel+not+working PDF link annotation
    • http://talkeetnaadventurelodge.com/uploads/1/3/0/4/130489800/9cca675.pdfIn PDF document text
    • http://caseinpaglia.com/uploads/1/3/0/8/130874570/3b080dfe5.pdfIn PDF document text
    • http://jauntykreations.com/uploads/1/3/1/1/131163634/wepilewem_nujun_fireguk_jipejisojonixe.pdfIn PDF document text
    • http://motherearthmysteryschool.org/uploads/1/3/0/8/130814681/votawut.pdfIn PDF document text
    • http://alvareztirez.com/uploads/1/3/0/5/130589186/wozaze.pdfIn PDF document text
    • http://feliciamings.com/uploads/1/3/0/4/130475994/2800296.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
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7556 8824 bytes
SHA-256: 429e9f02cd08de064f5e0821de83f6553ce3304b083b18e781b0ea8650c51714
font_01_sfnt_off0000972f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x972F 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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