Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b0418a63f942dc…

MALICIOUS

PDF

43.6 KB Created: 2020-03-12 10:30:59 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e4fb191bc863dcbc0c3da16127dee06f SHA-1: 5cabeb43707a2e19a072d345dfc99a0b8af80e72 SHA-256: d6b0418a63f942dc3ce4fa1227001e914fbd3846ade50c24f23fb55eeabc7060
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious content. The ML classifier strongly indicated maliciousness. The document body contains a reference to 'acanthosis nigricans skin lightening cream' and the PDF_SEO_LINK_FARM heuristic indicates the presence of a link farm, suggesting a lure to potentially harmful websites.

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://kassie-nichols.rominastiebenphotography.com/uploads/1/3/0/7/130740202/130740202.html#acanthosis+nigricans+skin+lightening+cream
    • http://birdislandplacenciabz.com/uploads/1/3/0/6/130604321/b364fcb8b670ad.pdf
    • http://cleatitupnow.com/uploads/1/3/0/6/130621277/jofokinafib-zizinopomonaj.pdf
    • http://interactivehq.com/uploads/1/3/0/7/130739478/7bb90b01f662.pdf
    • http://elpasoautosale.com/uploads/1/3/0/7/130740000/da0137426f0c48.pdf
    • http://virtualmemorycatcher.com/uploads/1/3/0/3/130323328/datol.pdf
    • http://caymansonline.com/uploads/1/3/0/5/130544494/9cc4e085f35f.pdf
    • http://www.asouthernaffairwa.com.au/uploads/1/3/0/6/130639971/79652ee395c75.pdf
    • http://sbinventions.com/uploads/1/3/0/5/130588244/mirezuratiwatet.pdf
    • http://manyaralakeview.com/uploads/1/3/0/6/130639632/850b4.pdf
    • http://bitadelzadeh.com/uploads/1/3/0/9/130969414/padunetamuvalosugeze.pdf
    • http://fabricadesonhosartesensibilidade.com/uploads/1/3/0/4/130488621/5a318d72d3.pdf
    • http://adamhamdy.net/uploads/1/3/0/6/130640194/gabiruwulurig.pdf
    • http://tantramassagenewzealand.com/uploads/1/3/0/3/130313555/6083865067fd6.pdf
    • http://hypocrisyofdisco.com/uploads/1/3/0/4/130475877/8199097.pdf
    • http://cpanel.uncagedventures.com/uploads/1/3/1/0/131070774/zavulesim.pdf
    • http://girlytwirl.com/uploads/1/3/0/7/130776811/f0ad9f2a5.pdf
    • http://emilyranney.com/uploads/1/3/0/4/130476943/xibodakul.pdf
    • http://hostmaster.dezaakdegruyter.nl/uploads/1/3/0/6/130620295/vegedudozugopikefase.pdf
    • http://lisathomas-designs.com/uploads/1/3/0/6/130604176/gaxodozifu.pdf
    • http://projectzone.com/uploads/1/3/0/7/130740017/dazofaxone.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_off000081ef.bin
a2db2009db0a56d3d0a58e2c778a24c82424887c9085702e641a34f398cad197		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81EF 8060 bytes

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