Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f52bf94cc72a836…

MALICIOUS

PDF

47.2 KB Authoring application: Nitro PDF
MD5: 21afbf62624b417625d727a29e9e844b SHA-1: a52f7936dafd7c27e20d961c0123c20b3fe5511f SHA-256: 4f52bf94cc72a8369c0b12005dfec47baa12633a4974afd1b93c84ee92cc6680
152 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and a machine learning classifier, as malicious. The primary indicator is the presence of a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The document body contains fragmented text and URLs, reinforcing the finding of a link farm. The embedded URLs are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 3

  • 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
  • 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://bungalows-semidees.com/uploads/1/3/0/6/130621853/jumatili_femad_fupixogijen.pdf
    • http://miam-foundation.com/uploads/1/3/0/6/130605472/bexipirolotasunig.pdf
    • http://holypost.biz/uploads/1/3/0/4/130476208/tajevul-sorewap-soxujepeker-pinipeginirevuk.pdf
    • http://neuroocenter.com/uploads/1/3/0/2/130288406/2667b.pdf
    • http://solerconsulting.com/uploads/1/3/0/4/130476272/514774.pdf
    • http://chefsplatemalta.com/uploads/1/3/0/6/130621574/249650.pdf
    • http://aedsa.ca/uploads/1/3/0/5/130551824/xisujojib.pdf
    • http://birdhousepdx.com/uploads/1/3/0/5/130588497/4855304.pdf
    • http://miniturecowboysrus.com/uploads/1/3/0/2/130291827/d49c8d8eab.pdf
    • http://bonniesminiaturedolls.com/uploads/1/3/0/4/130479435/wukelig.pdf
    • http://rocknreelcc.com/uploads/1/3/0/5/130588214/junir.pdf
    • http://birthingintentionally.com/uploads/1/3/0/5/130543293/pamevegedoso.pdf
    • https://puzuxorufi.weebly.com/uploads/1/3/0/5/130544386/rolavuzizur.pdf
    • http://spellfade.com/uploads/1/3/0/4/130490915/e747ea92c23.pdf
    • http://galadariassociates.com/uploads/2020/01/27/8141239.pdf
    • http://miraclesinmyanmar.org/uploads/1/3/0/5/130551534/rilod-zarudifuxi-notovarup.pdf
    • http://mariocoin.ru/uploads/2020/01/28/nefudupuda.pdf
    • http://newhavenmo.com/uploads/1/3/0/4/130483390/bimazazaxub.pdf
    • http://agrotel.ch/uploads/1/3/0/5/130543483/momon.pdf
    • http://bifi-nsk.ru/uploads/2020/01/29/xawabu_tagogupopamun_saviwiwureru_gudoturevazaso.pdf
    • http://tovam.rossip.ru/uploads/2020/01/28/wufusoze.pdf
    • http://blkaceau.com/uploads/1/3/0/2/130271076/tivebotetob.pdf
    • http://jtslawncare.org/uploads/1/3/0/6/130604524/6198403.pdf
    • http://my-mindful-mind.com/uploads/1/3/0/4/130476390/nopojokededepod_felureja.pdf
    • http://mik.slaveda.com/uploads/2020/01/28/fixoleg.pdf
    • http://bartolomeilaw.com/uploads/1/3/0/6/130639468/130639468.html#commonlit.+org+answer+key

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000199b.bin
d99fb65f619c6caacb3e267a6d9a105f7d383b95100c04e41c2f80602c7d4f24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x199B 8388 bytes

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