Malicious PDF — malware analysis report

Static analysis result for SHA-256 829b2983fbad58e6…

MALICIOUS

PDF

42.7 KB Created: 2020-03-21 01:50:28 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e796a84a489ce501b7ec5ffc3d775b04 SHA-1: 92511f35c865d5297b1e509c21e5d45151e90704 SHA-256: 829b2983fbad58e602e4a517139c3891b29673e1e2621d6957a8f6796d5c68cd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, identified as a PDF_SEO_LINK_FARM heuristic. The primary URL, http://creditabsb.com/uploads/1/3/0/9/130969689/130969689.html, is likely part of a campaign to drive traffic to potentially malicious or deceptive content. No scripts were extracted, but the sheer volume of linked domains suggests a coordinated effort to distribute content or exploit SEO tactics for malicious purposes.

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://creditabsb.com/uploads/1/3/0/9/130969689/130969689.html#ensayo+de+la+administracion+como+ciencia+tecnica+y+arte
    • http://people.co.nz/uploads/1/3/0/7/130776674/de577adad779c1f.pdf
    • http://adsl-67-64-35-203.lightonplaza.com/uploads/1/3/0/2/130291507/1892396.pdf
    • http://www.tele-rheum.com/uploads/1/3/0/7/130775544/6981975.pdf
    • http://indyhomeorganizer.com/uploads/1/3/0/2/130291702/jipajasakipir.pdf
    • http://bhmiii.com/uploads/1/3/0/2/130289166/4425314.pdf
    • http://helpdomore.com/uploads/1/3/0/8/130814868/5092121.pdf
    • http://bellavella.com/uploads/1/3/0/4/130476760/befexogozosirewitav.pdf
    • http://deverbouwformule.com/uploads/1/3/0/3/130379426/1840291.pdf
    • http://ncahrmm.com/uploads/1/3/0/8/130813399/1710186.pdf
    • http://bodybarn.net/uploads/1/3/0/4/130491356/f7ef6.pdf
    • http://fishballyhoo.com/uploads/1/3/0/6/130603988/b118dd2d3.pdf
    • http://ellegeorgina.com/uploads/1/3/0/3/130323182/tapawumar-kubolored-kebatub.pdf
    • http://create.center/uploads/1/3/0/7/130738628/2567362.pdf
    • http://www.sasquatchdiscs.com/uploads/1/3/0/6/130621200/dowarapovo.pdf
    • http://coldwellbankercommercial-seattle.com/uploads/1/3/0/5/130539933/koxivapanumo-pajeruse.pdf
    • http://host50.tri-waymold.com/uploads/1/3/0/2/130289241/ef95a10878e96d8.pdf
    • http://techknowbuddies.com/uploads/1/3/0/2/130289611/kikawixoxajisam.pdf
    • http://arc170.com/uploads/1/3/0/3/130313220/rivafuzeb_kalifaniruwoxa_xarobadagagun_vijefulif.pdf
    • http://thisgirlsays.com/uploads/1/3/0/7/130776245/5148097.pdf
    • http://ontherolljoplin.com/uploads/1/3/0/4/130489081/3496952.pdf
    • http://www.matthew-j.com/uploads/1/3/0/5/130547450/2a1753f.pdf
    • http://www.raisingtheblues.com/uploads/1/3/0/6/130604993/gudeve.pdf
    • http://www.romeda.net/uploads/1/3/0/4/130488530/8eaca9e.pdf
    • http://learntosailswf.com/uploads/1/3/0/3/130323962/vulofugavudiga.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_off00007ad5.bin
f2929df4d422edcaf3657b38a5783f05e92daf7453c8d55cdc4562daf8a3130e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD5 9544 bytes

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