Malicious PDF — malware analysis report

Static analysis result for SHA-256 203fcdea8bb22f7d…

MALICIOUS

PDF

39.8 KB Created: 2020-04-03 12:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1623ff3820708eae325e563cefce1dfb SHA-1: 6d745c57b1620749a442b7df520f75feca5cab54 SHA-256: 203fcdea8bb22f7d0d4d5309f74b7e4de46b5a3b64ef7fe7c82864970c83d2f4
94 Risk Score

Malware Insights

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

The PDF contains numerous external links to other PDF files hosted across various domains, indicating a link farm or distribution network. The ML classifier strongly flagged this PDF as malicious. The document body text is largely obfuscated but contains a reference to 'neck soft tissue mass icd 10', which may be a lure. No scripts were extracted from this sample.

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://wildchild.dance/uploads/1/3/0/7/130739793/130739793.html#neck+soft+tissue+mass+icd+10
    • http://my-brad-lisa-memories.com/uploads/1/3/0/8/130814769/tizagaxamoki-niwol-virogoseg.pdf
    • http://xclusivsalon.com/uploads/1/3/1/3/131383271/7275208.pdf
    • http://thehazecorp420.com/uploads/1/3/0/5/130539345/3dba557ffaf96.pdf
    • http://realtexaswines.org/uploads/1/3/0/5/130539820/fodowonobutoror.pdf
    • http://lthomas.ca/uploads/1/3/0/5/130588451/cba1db23d25.pdf
    • http://peterehrensberger.com/uploads/1/3/0/5/130588433/paradepikite-niworit-luxije.pdf
    • http://chalkboardquilts.com/uploads/1/3/0/4/130483086/8260861.pdf
    • http://hersosolucioneseficientes.com/uploads/1/3/0/6/130620801/8021038.pdf
    • http://organgienaturalstore.com/uploads/1/3/0/9/130969153/tolaturata.pdf
    • http://cbbcveedersburge.org/uploads/1/3/0/9/130969149/wikunur_bekisewuvenug.pdf
    • http://royfm.net/uploads/1/3/0/4/130435574/eaaabdb31f.pdf
    • http://indigodistributors.com/uploads/1/3/0/3/130379590/0a8775cb.pdf
    • http://lohtest.com/uploads/1/3/0/6/130621075/renunixarox-xenitosiwage.pdf
    • http://mycecilialopez.com/uploads/1/3/0/7/130738936/1e01bc35331e8.pdf
    • http://4saleinwv.com/uploads/1/3/0/7/130739419/31a9f4fb4a5.pdf
    • http://savemundypondpark.com/uploads/1/3/1/4/131454120/pusawu.pdf
    • http://rangefinderguns.com/uploads/1/3/0/4/130488175/3015625.pdf
    • http://candalassociates.com/uploads/1/3/0/5/130540823/mazoket.pdf
    • http://lashesbyprestige.com/uploads/1/3/0/8/130814645/zutikilepotinan.pdf
    • http://bavalon-archief.be/uploads/1/3/0/5/130590373/4071427.pdf
    • http://newmintage.com/uploads/1/3/0/4/130436272/rubodebamopi_kidakigizabi_botimamed.pdf
    • http://agwrenewableenergycompany.com/uploads/1/3/0/6/130621918/xuziroreguvovuga.pdf
    • http://crossettcitypool.com/uploads/1/3/1/3/131397997/kifesaposoj-namimeziputisa-lozotobemik-fabomasi.pdf
    • http://mail.neworleanshosts.com/uploads/1/3/0/6/130604878/4078c84a8a7e.pdf
    • http://wwwbeautifulcleanhouse.com/uploads/1/3/0/5/130588357/dozedejidojij.pdf
    • http://mail.neworleanshosts.com/
    • 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_off00007511.bin
23120fb8ce83835937649a1c67bf13bf606a1e7914ef3dc0f2d04df819791e59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7511 7172 bytes

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