Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1140ba1056a55d8…

MALICIOUS

PDF

47.0 KB Created: 2020-04-05 12:22:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: afd8ed7b935a0be4f32ea82540a729f1 SHA-1: 2d103a4e96051ebae4241634f23be499c23139ab SHA-256: b1140ba1056a55d8afc02d128caae8e84bb6f268c5551325e48c91e4a75d81fd
92 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier as malicious. It contains a large number of external links, many of which point to PDF files hosted on unrelated domains, suggesting a link farm or SEO poisoning tactic. The document body, though partially corrupted, contains references to 'Cfa level 1 investopedia study guide', indicating a lure to disguise the malicious intent. The primary attack pattern involves directing users to a network of suspicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://holanomadas.com/uploads/1/3/0/3/130323818/130323818.html#cfa+level+1+investopedia+study+guide
    • http://woodwardmagnetschool.org/uploads/1/3/0/5/130552073/fodojuxali.pdf
    • http://iowajuniorcamp.com/uploads/1/3/0/4/130488834/539010.pdf
    • http://rusticwallet.com/uploads/1/3/0/2/130272095/a6358b7249f193.pdf
    • http://jazzheartjazz.com/uploads/1/3/0/2/130291033/587897.pdf
    • http://travel-glam.com/uploads/1/3/0/7/130776460/40deef42c1335.pdf
    • http://pinkcontainers.com/uploads/1/3/1/0/131069750/pikijofunid-newekaso.pdf
    • http://ingenieriaelectronicacun.com/uploads/1/3/1/4/131406852/707060ced03f6.pdf
    • http://lisemazerolle.com/uploads/1/3/1/0/131070340/nofekakipunasugifan.pdf
    • http://myhomeyworld.com/uploads/1/3/0/6/130604050/zotupenunivit_fovapolum_segolasamo.pdf
    • http://p205design.com/uploads/1/3/0/9/130969080/3468358.pdf
    • http://raworegonhoneycbd.com/uploads/1/3/0/5/130550736/pagilevulu.pdf
    • http://reggieeaves.com/uploads/1/3/0/6/130621053/bukarimesoje.pdf
    • http://tesshenry.com/uploads/1/3/0/5/130551342/91b9fb320b.pdf
    • http://renebuesing.de/uploads/1/3/1/4/131453741/c5255e2cc535f08.pdf
    • http://640nlasalle.com/uploads/1/3/0/6/130604642/26b582.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007976.bin
51e3f0fc7d603c1713bf639df1ae8912f2ba3ef6c0722d7a57c318f6cc4079f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7976 8512 bytes
font_01_sfnt_off000099f4.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99F4 16036 bytes

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