Malicious PDF — malware analysis report

Static analysis result for SHA-256 9230501f9371f361…

MALICIOUS

PDF

48.3 KB Created: 2020-03-24 02:51:46 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 166448a8c735d9e3371b08979b66dfe5 SHA-1: 00b053d8caea74780901a091dcff7f694fbdeb63 SHA-256: 9230501f9371f361c40ed0d1b08db5446c6d6c84e42de22e6345f2e1bf04fd71
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The ML classifier strongly indicated maliciousness. The document body contains text related to research objectives and the authoring application, but the primary malicious activity appears to be the mass distribution of external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • 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://botshabeloangels.org/uploads/1/3/0/7/130775912/130775912.html#verbos+para+objetivos+especificos+en+una+investigacion
    • http://www.getitindustrial.com/uploads/1/3/0/8/130874285/jezaz-mavifa-newewenem-jedemorenaxa.pdf
    • http://2016tdffb.com/uploads/1/3/0/2/130273803/8946998.pdf
    • http://www.tidyt.com.au/uploads/1/3/0/8/130874123/nizixunewomiza-zamotelosuneko-meledi-fuvaxureg.pdf
    • http://sportexperts.tv/uploads/1/3/0/7/130776603/netelurane.pdf
    • http://postmaster.guesthouse-manabe.com/uploads/1/3/0/8/130814783/xodatuw.pdf
    • http://media.tmd55.org/uploads/1/3/1/0/131069950/3666663.pdf
    • http://maisonbeautylounge.com/uploads/1/3/0/6/130605475/rekuda-serovewejika.pdf
    • http://holidaymason.com/uploads/1/3/0/3/130313494/dewun-fixagumabuzik-wesagu-movuj.pdf
    • http://ganicxnaturals.com/uploads/1/3/0/6/130621702/tefunesexe-favodudolu-sufiroliluwim-sivekavuw.pdf
    • http://mypyxy.com/uploads/1/3/0/3/130323515/f9bbe4081.pdf
    • http://www.hollyboggs.com/uploads/1/3/1/0/131070293/c1a705.pdf
    • http://jniconsultingllc.com/uploads/1/3/0/7/130775116/lafalibetizu-kifamabujoz-badod-riwixejopevilu.pdf
    • http://74-123-77-126.mgwnet.com/uploads/1/3/0/8/130874073/zujurajurobeboj-bugevifodo-witesiwodolef-gewovise.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_off0000917b.bin
760e8bef17af7504101656da93792fff258a019f2319ea923963e6cc0fe01461		 pdf-font-stream PDF embedded font (sfnt) at offset 0x917B 9064 bytes

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