Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef5afcff6367c96…

MALICIOUS

PDF

41.2 KB Authoring application: Poppler-utils
MD5: fbcd1c5c11e03977157f4526190dd31b SHA-1: 5b3f97d6bc6140065253584058891ea628eddd97 SHA-256: 5ef5afcff6367c96914317ff696414d08fcda43217e9d24377863ccd546f5929
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, identified as a link farm, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were explicitly extracted, the structure and embedded URLs point towards a phishing or content-serving mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://docksideengraving.com/uploads/1/3/0/6/130639257/3349377.pdf
    • http://orduns.net/uploads/1/3/0/4/130435641/3bb26a.pdf
    • http://mollybooth.com/uploads/1/3/0/4/130488220/c36e95d0536.pdf
    • https://javudaxususun.weebly.com/uploads/1/3/0/2/130288720/nufixivudibigo_zaruzuxigop_pojitovab_xowikeb.pdf
    • http://aaron.ag/uploads/1/3/0/4/130476458/gosapizo.pdf
    • http://fun.splitvolgograd.ru/uploads/2020/01/29/e9a593a1dc5dd.pdf
    • https://fafotota.weebly.com/uploads/1/3/0/4/130476866/xuzefebopujigibe.pdf
    • http://bigislandeventrentals.com/uploads/1/3/0/4/130488884/zivajumazo.pdf
    • http://envt225malta2019.com/uploads/1/3/0/6/130620957/zivatosa.pdf
    • http://wisex.jop-schorbach.com/uploads/2020/01/27/bubobev-dazav.pdf
    • https://namasazamugex.weebly.com/uploads/1/3/0/6/130605124/7613535.pdf
    • http://charlidrawz.com/uploads/1/3/0/6/130639201/lurowamub-dizowil.pdf
    • https://tuxudejikevove.weebly.com/uploads/1/3/0/6/130605338/09e58889d.pdf
    • http://lukabu.minzdrvonline.ru/uploads/2020/01/29/760124.pdf
    • http://naturalbirthingjoy.com/uploads/1/3/0/6/130605433/namejodijefuxitoj.pdf
    • http://abrprojectsaustralia.com.au/uploads/1/3/0/6/130639689/doxijad.pdf
    • http://preventyogainjury.com/uploads/1/3/0/6/130603761/4304580.pdf
    • http://nicolitulk.com.au/uploads/1/3/0/6/130640142/130640142.html#job+advertisement+format+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000014e6.bin
7da65c6253d47cbfc4f1e003980b4a7ee10665ffbdbd569c89a627ac21e66b2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E6 8336 bytes

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