Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bd78887b37c7f62…

MALICIOUS

PDF

51.9 KB Created: 2020-04-02 11:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9caf1cabe5d4b2e0968e71553bc64c74 SHA-1: 8d7fd76e07f1f47ef791b253698ac66a3de63d74 SHA-256: 4bd78887b37c7f62057092e8bb306d377108e5ce69cad719129021928c645189
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files on similarly structured domains. This suggests a link farm or redirection scheme designed to drive traffic. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the extensive use of external URLs indicates a likely attempt to lead the user to malicious content or phishing pages.

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://startupsummersfl.com/uploads/1/3/0/4/130483350/130483350.html#matrix+multiplication+complex+numbers+calculator
    • http://masteringlifeandrelationship.com/uploads/1/3/0/7/130776219/puridevuv.pdf
    • http://linxnw.com/uploads/1/3/0/3/130379529/kubeke.pdf
    • http://houseofadonia.com/uploads/1/3/0/6/130604229/7730555.pdf
    • http://bigd401k.com/uploads/1/3/0/6/130604580/5878063.pdf
    • http://flighttrainingmentor.com/uploads/1/3/0/6/130640013/xevuziberefad.pdf
    • http://vacuumexcavationsunlimited.com/uploads/1/3/0/4/130483680/6691874.pdf
    • http://kempercpa.org/uploads/1/3/0/7/130738755/153211.pdf
    • http://jpshealandscape.com/uploads/1/3/0/2/130289461/josove-mesifoxoz-rixuwepavenizu.pdf
    • http://wellnessembodiedhealth.com/uploads/1/3/1/3/131398335/samufofijoveme-dapoj-boxudexujideziz.pdf
    • http://melbournehotelplaceholder.devsite-1.com/uploads/1/3/0/5/130590464/potona.pdf
    • http://tetrand.com/uploads/1/3/0/6/130639700/lajukedenukixi.pdf
    • http://thepowderconnection.com/uploads/1/3/0/4/130436108/b2012815c.pdf
    • http://wyndapp.com/uploads/1/3/1/1/131164496/tabaja.pdf
    • http://californiaapprovedpipespecialist.com/uploads/1/3/0/5/130550706/2ee93e64302727.pdf
    • http://eatwellwithmir.com/uploads/1/3/0/6/130603764/16d00e7.pdf
    • http://sarahpounds.com/uploads/1/3/1/3/131381720/ddb1810c.pdf
    • http://nourks.com/uploads/1/3/0/5/130589150/9797701.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007eb8.bin
c3b926bb3c5ba99b73bf9838e527dd7393a5f56181e67dbccd23ea2debac7570		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB8 9172 bytes
font_01_sfnt_off0000a1b6.bin
4fa858b82b445805eff69b872cfcae0b273ce6c644f001a2365b71733efe32ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1B6 2988 bytes
font_02_sfnt_off0000ac48.bin
cc8869df30b71529a912fc72de00b939142552c09d00531f0c65a87d7f1fa33b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC48 16084 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.