Malicious PDF — malware analysis report

Static analysis result for SHA-256 389bbefa2a8bba35…

MALICIOUS

PDF

98.6 KB Created: 2020-04-11 21:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7bc71cb72d23fa45c4655bb7dff9b082 SHA-1: 996768b25b3fd90558ca20619864c1b64cfc0270 SHA-256: 389bbefa2a8bba35010aa733737fd88e05552f949b1d40ac3d754db31c048150
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm or SEO spam campaign, designed to drive traffic to potentially malicious sites. The document body mentions 'Nefropatia diabetica 2017', suggesting a lure related to medical conditions to entice clicks. No scripts were extracted, and the primary malicious activity appears to be the distribution of numerous external links.

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://marythumma.com/uploads/1/3/0/4/130490928/130490928.html#nefropatia+diabetica+2017
    • http://forcegenetics.us/uploads/1/3/0/8/130874393/kuseboxeb.pdf
    • http://mudduckdetailing.com/uploads/1/3/0/7/130775634/rajukasabirofelemow.pdf
    • http://bigbassbaitscustomlures.com/uploads/1/3/0/5/130547112/bamawemina.pdf
    • http://carolinaathleticpowerhouse.com/uploads/1/3/1/3/131381589/nesifesotuve.pdf
    • http://madisonhoteldemo.com/uploads/1/3/0/7/130738841/28331c97b.pdf
    • http://watersmackerfriends.org/uploads/1/3/0/6/130621290/4673649.pdf
    • http://thelazyrussian.com/uploads/1/3/1/4/131454427/wafenebesududoz.pdf
    • http://masliahcenter.org/uploads/1/3/0/3/130313345/lamavexowobowosozi.pdf
    • http://vangeliskanellis.com/uploads/1/3/0/8/130874272/kewejijemob_saxuzod_kebipupudebise.pdf
    • http://kingvigilante.com/uploads/1/3/1/3/131379655/pobaja-buderuwexetor-bunuwise.pdf
    • http://volry0-dvto99.com/uploads/1/3/0/3/130313383/wavosudonigab.pdf
    • http://altitudenursingservices.com/uploads/1/3/0/5/130588560/1717143.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b2c.bin
16266618774a59308acb693688352fe7eb802377901e4af915f1bb435dcd3a5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2C 1820 bytes
font_01_sfnt_off000133c0.bin
178b3e25e73d1a5458666a14449c400f379a9cb0810634530586311a3cdc3ba1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133C0 10700 bytes
font_02_sfnt_off00015987.bin
f61802ac6c648ea839152b1922605b999a525f7ba8da1f38b1daca17e458418e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15987 3388 bytes
font_03_sfnt_off0001656f.bin
3f572173060110658280d60777c6d43c6b04a7370b642443033ed543e2afe551		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1656F 16192 bytes

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