Malicious PDF — malware analysis report

Static analysis result for SHA-256 653917dcd0909ab8…

MALICIOUS

PDF

42.5 KB Authoring application: SWFTools
MD5: 4ce88715809d8a0c654022192016f876 SHA-1: a1675c0d6039a0ac7ecafa28e2f79af6d3317d8c SHA-256: 653917dcd0909ab8c3c2b30a6d8e227bbdc6790a470f3bd8ca8b1f009d3836be
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous algorithmically generated URLs, indicating a link farm designed to host malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs are the primary indicators of compromise, pointing to potential second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://rudingantengdarilahir.com/uploads/1/3/0/3/130323377/rasek.pdf
    • http://susitixet.bp-bas.com/uploads/2020/01/28/0a7be65.pdf
    • http://jpphillips.org/uploads/1/3/0/5/130588480/puxul.pdf
    • http://newriverknockouts.org/uploads/1/3/0/3/130323162/3e59d9.pdf
    • http://ngstaff665.weebly.com/uploads/1/3/0/3/130313624/vegadofilefu.pdf
    • http://friendlylazur.com/uploads/2020/01/28/jojaf_ziraxeva_fomomodafo.pdf
    • http://delaneyparsons.com/uploads/1/3/0/3/130323506/8204ace.pdf
    • https://xejadopidevid.weebly.com/uploads/1/3/0/6/130604922/344786.pdf
    • http://morningtonpeninsulacaravanstorage.com/uploads/1/3/0/5/130589411/lafegedoridiwe-sedemikopo-bakapesasa.pdf
    • http://andreanelsonart.com/uploads/1/3/0/6/130621123/9864329.pdf
    • http://misssupremepurityqueen.com/uploads/1/3/0/5/130545087/130545087.html#don%27t+starve+together+wickerbottom+sanity+guide
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001272.bin
95ed5d5114d355b3847b41779b090fd359e8861817fa097d2b3e70b592c5218b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1272 7876 bytes
font_01_sfnt_off00005ead.bin
5d7ebd720715cd86529581f1d40cc643f68465477bd430d4be5ff736bc95f798		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAD 16268 bytes

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