Malicious PDF — malware analysis report

Static analysis result for SHA-256 7518a75637963401…

MALICIOUS

PDF

47.3 KB Created: 2020-03-30 05:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c9633d72fa4789d2852e08b5581cc490 SHA-1: d698370be570a99fdf9752aff76b4cd657f87baa SHA-256: 7518a756379634011d1dcbcc3eb1966afa672da46a98fe19e009d551df6fcb1b
136 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, forming a link farm, which is a common tactic for SEO manipulation or distributing malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests that the document may also be used to trick users into providing passwords for encrypted archives, likely to bypass security scanning. The embedded URLs are the primary indicators of malicious activity, pointing to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://melbournehotelplaceholder.devsite-1.com/uploads/1/3/0/2/130274304/130274304.html#frases+celebres+sobre+la+lectura+cortas
    • http://kevinortizsf.org/uploads/1/3/0/6/130621847/jewunogunatoka.pdf
    • http://www.1stumcstudentministries.org/uploads/1/3/0/8/130813547/tapusobesoramuwi.pdf
    • http://jenniferquiltyrmtcdt.com/uploads/1/3/0/5/130546742/adca42.pdf
    • http://a2zhomeinsp.com/uploads/1/3/0/2/130272955/2782045.pdf
    • http://studiosamala.com/uploads/1/3/0/3/130323659/xibipuzalozis.pdf
    • http://olmanlandscaping.com/uploads/1/3/0/5/130551125/tuvojuxamib.pdf
    • http://menofzion.org/uploads/1/3/0/4/130476150/ceaf8853ee79.pdf
    • http://craigallencomedy.com/uploads/1/3/0/4/130483194/pipan_guturo_dodove_xipewodig.pdf
    • http://heritageportfoliotransactions.com/uploads/1/3/0/2/130289731/sugud.pdf
    • http://studio-1999.com/uploads/1/3/0/6/130620752/6698561.pdf
    • http://woodstockvintage.org/uploads/1/3/0/5/130590673/7362251.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008f1a.bin
f664c148c38cc4d64159195ef2b511e6df73cc1d6a8b1d96911eda906b680802		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F1A 9376 bytes

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