Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed6bab098c59c19…

MALICIOUS

PDF

39.6 KB Created: 2020-03-28 06:07:33 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c7e2f878bb99fc68d771c2e248138b51 SHA-1: 7b6e584cc053985cf13865d2f3e9a6af5cfaee8c SHA-256: 1ed6bab098c59c1929e81e63b36e8b52f030dd56a67ae9980530fae25fb0c04a
94 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links to external PDF files, a technique often used for SEO link farming or to redirect users to malicious content. The ML classifier strongly indicated maliciousness. The document body, though partially corrupted, contains text related to song lyrics and chords, likely serving as a lure to disguise the malicious intent of linking to numerous external sites.

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://colorado-es.com/uploads/1/3/0/7/130775953/130775953.html#in+christ+alone+lyrics+and+chords+hillsong
    • http://www.lislecabaretnight.com/uploads/1/3/0/9/130969506/lojakuge.pdf
    • http://kioskorestaurantbar.com/uploads/1/3/0/6/130620991/tulubunemo.pdf
    • http://b-kool.com/uploads/1/3/0/7/130738863/9f91c56e95.pdf
    • http://ortaklargrup.net/uploads/1/3/0/4/130491253/julemekegu.pdf
    • http://www.tintinstuckshop.com/uploads/1/3/0/4/130476112/mijok_baket_xitefupev.pdf
    • http://usdaum.one/uploads/1/3/0/6/130620237/2d27c.pdf
    • http://crisat.com/uploads/1/3/0/2/130272848/4203119.pdf
    • http://riverscapealaska.com/uploads/1/3/1/1/131163943/1231556.pdf
    • http://ictsecurity.co/uploads/1/3/0/5/130551153/2008955.pdf
    • http://paulccleaningservices.com/uploads/1/3/0/4/130489371/womeradoneripapo.pdf
    • http://heartofmuskokagallery.com/uploads/1/3/0/7/130776151/dejejazeguzup.pdf
    • http://piute-high-school.com/uploads/1/3/0/4/130476447/rolofavej-sujuzikere.pdf
    • http://southerncharms60.com/uploads/1/3/0/7/130739561/66eeb9c8de24e.pdf
    • http://ardmacelectric.com/uploads/1/3/0/7/130776525/1ba4a3e32.pdf
    • http://ukasiaproperty.com/uploads/1/3/0/7/130739746/2187765.pdf
    • http://sixtarubio.com/uploads/1/3/0/4/130483745/tajafadaranagaw-piwenoxete.pdf
    • http://budapestartsociety.com/uploads/1/3/0/4/130483276/tijemadoga_lulav_korinavixokenaw_zokalulaluzo.pdf
    • http://annsmithphotography.com/uploads/1/3/0/3/130323556/vifijurekakexogalin.pdf
    • http://www.xxlleague.com/uploads/1/3/0/8/130814471/zugelub.pdf
    • http://aicapsule.com/uploads/1/3/0/2/130272420/xiwiwim.pdf
    • http://mta-sts.iskamsos.info/uploads/1/3/0/6/130620272/zamovomikuritedat.pdf
    • http://corehealthnutrition.org/uploads/1/3/0/8/130874514/21525.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_off000071ff.bin
29e89330c176db0353446dc66676599a1e63d8b94697d3ad0e7e4b8ac333ceca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71FF 7260 bytes

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