Malicious PDF — malware analysis report

Static analysis result for SHA-256 1586b3ce6ef8c622…

MALICIOUS

PDF

42.7 KB Created: 2020-04-02 00:35:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8a9b4517b35b101860cd52b24494eca9 SHA-1: ed40d581e16ff46dde3f2a028429403798e6f9fe SHA-256: 1586b3ce6ef8c6224d0844bf6a9e35297ae9c5ea4e1b519c5f14563c78082c39
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. While no scripts were explicitly extracted, the embedded URLs are the primary indicators of malicious activity, likely serving as lures or downloaders.

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://rapidpermitreviewhawaii.com/uploads/1/3/0/2/130274301/130274301.html#mods+compatible+with+enderal
    • http://discoverkiting.com/uploads/1/3/0/7/130775556/8877682.pdf
    • http://kayhike.com/uploads/1/3/0/5/130543320/pokosut_logugojesebove_diweke.pdf
    • http://mdhippies.com/uploads/1/3/0/9/130968963/2337282.pdf
    • http://moultonlawgroup.com/uploads/1/3/0/5/130540178/3464780.pdf
    • http://holisticwellnessma.com/uploads/1/3/0/3/130313790/13f166066bf70.pdf
    • http://winandchocolate.com/uploads/1/3/0/6/130604948/vebusumidipep-guzukufozo-kanujoxeb.pdf
    • http://ruesbeyondboarders.com/uploads/1/3/0/6/130621608/bd584.pdf
    • http://syracusechildrenschorus.org/uploads/1/3/0/6/130604466/1215ba1ceec6d6.pdf
    • http://oilabsorbingsheets.net/uploads/1/3/1/3/131379255/vuxerezurerawixin.pdf
    • http://classicated.com/uploads/1/3/0/3/130379674/5ab1b.pdf
    • http://raisekidsup.org/uploads/1/3/0/2/130289375/207237.pdf
    • http://lindseymkurtz.com/uploads/1/3/0/7/130776436/nakeduvobuzu.pdf
    • http://mommawantsabreak.com/uploads/1/3/0/4/130488974/gafosevi-kavebunakas-wupapuzozut.pdf
    • http://bpmusiceditions.com/uploads/1/3/0/2/130289247/1572719.pdf
    • http://www.kysoentertainment.com/uploads/1/3/0/5/130588173/pajipoziwutixovogif.pdf
    • http://abroadstudy.com/uploads/1/3/0/6/130604425/e6eb2512e2cefd1.pdf
    • http://dzire2inspire.net/uploads/1/3/0/2/130288406/jilenu_jibul_rolejakot_gimamutejivi.pdf
    • http://foxinacrate.com/uploads/1/3/0/5/130551764/1762651.pdf
    • http://cascadiatrading.com/uploads/1/3/1/3/131380183/ziwosupikiwewosik.pdf
    • http://teamlendaris.com/uploads/1/3/0/6/130639258/4844604.pdf
    • http://advantageiifordogs.com/uploads/1/3/1/4/131407572/4033775.pdf
    • http://madcowstickers.com/uploads/1/3/0/2/130272432/523edc7f8.pdf
    • http://memphistvmount.com/uploads/1/3/0/6/130639740/makevogadomu.pdf
    • http://maryswettcoaching.com/uploads/1/3/0/4/130476043/1798545.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_off00007a11.bin
515079a225825a0b1376b955abd6d25fd58e11df134b8aec4ea0258676fbf26f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A11 9224 bytes

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