Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bca7f820075181a…

MALICIOUS

PDF

37.0 KB Authoring application: PDF Studio
MD5: 34aa1c92fcf097b93ae95e3996f7b707 SHA-1: 6c32fd2ea7235b4648a395c529b009a58aade386 SHA-256: 1bca7f820075181adf3e5e0ea952ece67cd32334a8d36360ae89c5c3a9f14aed
200 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link T1059.003 Windows Command Shell T1218.011 Rundll32

The PDF contains a large number of embedded URLs, many of which follow a similar numeric or descriptive slug pattern, suggesting a link farm for SEO or phishing. The heuristic 'SE_CLICKFIX' indicates the document likely instructs the user to press Win+R or paste a command into a terminal, aligning with social engineering tactics to bypass macro restrictions. The 'SE_LOLBIN_RUN_COMMAND' heuristic further supports that the document contains instructions for executing commands via Windows scripting tools. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' confirms a phishing intent. The primary attack pattern involves tricking the user into executing a command that likely downloads and runs a malicious payload.

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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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
  • 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://spccmd.com/uploads/1/3/0/4/130488332/3137609.pdf
    • http://sylvanhallfarm.com/uploads/1/3/0/2/130289803/6765747.pdf
    • http://balloonartist.eu/uploads/1/3/0/6/130604125/7a383826a59722.pdf
    • http://jellytel.com/uploads/1/3/0/4/130476538/fexixalavapebose.pdf
    • http://www.japaneseindiegames.com/uploads/1/3/0/5/130550898/e6bba.pdf
    • http://bark-blaster.com/uploads/1/3/0/2/130272270/dagaxilul_rijuwafiwesokij_jekeduk_lejekujel.pdf
    • http://www.ortegaeng.com/uploads/1/3/0/6/130603747/nadifides.pdf
    • http://mrsmorones.com/uploads/1/3/0/3/130313000/ea83101f304243.pdf
    • http://joyfulnoise.info/uploads/1/3/0/5/130539912/bejaran_misaz_xenusi.pdf
    • http://pusayorkunited.net/uploads/1/3/0/2/130272270/nirizemavusamal.pdf
    • http://crazychickboutiqueandgift.com/uploads/1/3/0/6/130620668/9381559.pdf
    • http://mx.godwinband.org/uploads/1/3/0/6/130605204/sirafagawosowategi.pdf
    • http://kongware.com/uploads/1/3/0/4/130436439/xasevuduvap-fogobo-motarewutobuji.pdf
    • http://thinkhappyvibehappy.com/uploads/1/3/0/7/130775127/331f21ca8d5.pdf
    • http://www.midtrans.online/uploads/1/3/0/2/130272234/130272234.html#command+prompt+commands+windows+10

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000036ad.bin
478ff82865887cf26414ee2ea3922ae9c4e9b9e1ada4013f878334c36dce0a24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x36AD 7980 bytes

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