Malicious PDF — malware analysis report

Static analysis result for SHA-256 987ee2560559b27b…

MALICIOUS

PDF

31.2 KB Created: 2020-04-10 03:19:23 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 992d00699cd1b6a6f469e68704f6c039 SHA-1: b0e65efb0d54307842ec266ea25aeeeb1df727eb SHA-256: 987ee2560559b27b86113f00208d646a53b6f39754bc792fc3e137df3f5a8b7e
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a large number of external links to other PDF files hosted on various domains. This is indicative of a link farm or SEO spam campaign, designed to drive traffic or distribute malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, and the document body was heavily obfuscated, but the presence of numerous external PDF links is the primary indicator of malicious intent.

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://atasteofjamaicaandmore.com/uploads/1/3/0/3/130323600/130323600.html#to+kill+a+mockingbird+comprehension
    • http://underleaves.com/uploads/1/3/1/3/131382486/c6b6280498217.pdf
    • http://rosslerfit.com/uploads/1/3/1/1/131164557/4ae0db.pdf
    • http://incomparablelove.com/uploads/1/3/0/3/130379243/befuv_dipitepanoxis_raxezonadope.pdf
    • http://abbehhc.com/uploads/1/3/0/5/130590261/fejerabelidun.pdf
    • http://taylorleefit.net/uploads/1/3/1/4/131408008/xanilojike.pdf
    • http://countryroadcreations.org/uploads/1/3/1/4/131454178/lofebetefonokep.pdf
    • http://findahomeincentralflorida.com/uploads/1/3/0/3/130313144/zalotozipevib-pugus-jumapaxedov-wolupowuvesaxil.pdf
    • http://lashpopstudio.com/uploads/1/3/0/7/130776854/839594.pdf
    • http://truurelief.com/uploads/1/3/1/4/131454859/06aad.pdf
    • http://centerforconsciousredesign.com/uploads/1/3/0/5/130546759/wudebinovofa-tiwak-bilagitux.pdf
    • http://basedsavage.com/uploads/1/3/0/8/130815311/8606791.pdf
    • http://suziehorneartist.com/uploads/1/3/1/3/131384226/kiniwumimoda.pdf
    • http://longkieustudio.com/uploads/1/3/1/4/131437859/nejarez-dekizokaga-fomakopupaduzol-wigejajolase.pdf
    • http://ftharrodjazzartsfest.com/uploads/1/3/0/5/130539584/zoxino_netebut_makaluvemoke_wasaduwixogoku.pdf
    • http://sacredgroundmassage.com/uploads/1/3/0/7/130740537/nirego_redonoseju.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_off000054b2.bin
cdbecf6a97373c52c96f4402d12fa497f1a99251a85f3572832e3b12d2dbf690		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54B2 6748 bytes

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