Malicious PDF — malware analysis report

Static analysis result for SHA-256 facd3823c8298b11…

MALICIOUS

PDF

56.1 KB Created: 2020-03-29 14:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 20e69aa6777ed9d12da3d4ae751bcd3b SHA-1: 7ef713789569c2f8b5e463396fdcc1932abf1519 SHA-256: facd3823c8298b11ec4349919fdc9903aeddcda686e932bb04b63b80fbd2848f
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The document body contains garbled text and references to 'Schumacher electric speed charger' and 'wkhtmltopdf', suggesting a potential lure or obfuscation. The primary attack pattern involves directing users to a vast network of linked domains.

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://host.creativedatainc.com/uploads/1/3/0/9/130968947/130968947.html#schumacher+electric+speed+charger
    • http://falleveningwithbbbs.org/uploads/1/3/0/6/130603802/bosap.pdf
    • http://saludwellnessproviders.com/uploads/1/3/0/7/130738567/pusopi-tojubiluvejo-retifufimu.pdf
    • http://luvsheascloset.com/uploads/1/3/0/7/130740133/2dd973a2b696b.pdf
    • http://alrabieaalarabi.net/uploads/1/3/0/4/130489361/xenabanozodane_favusedekewefub.pdf
    • http://doublebloomcreations.com/uploads/1/3/0/5/130589219/kubebejeteletagu.pdf
    • http://bis-manmentorsquad.net/uploads/1/3/0/2/130270924/99699fbd.pdf
    • http://fordcountrylasvegas.com/uploads/1/3/0/5/130588834/2035163.pdf
    • http://salusconsilium.com/uploads/1/3/0/4/130436040/pubenevosu.pdf
    • http://www.thebrigadoonsaba.com/uploads/1/3/0/7/130775732/6633728.pdf
    • http://newpstowing.com/uploads/1/3/0/6/130605256/gilidabiduwoba.pdf
    • http://chicagolsat.com/uploads/1/3/0/5/130588246/045f498.pdf
    • http://rollingmetalauto.com/uploads/1/3/0/8/130814687/24e8dc3326b5.pdf
    • http://northwesterncomputerservices.com/uploads/1/3/0/7/130776399/razoge_rotezo_vugogolegewop.pdf
    • http://summitridgeguides.org/uploads/1/3/0/4/130436521/8097436.pdf
    • http://thechurchofbrotology.com/uploads/1/3/0/6/130621973/zalamanuvamuvegofot.pdf
    • http://chasinglions.org/uploads/1/3/0/5/130588927/8466056f.pdf
    • http://psy-sur-paris.com/uploads/1/3/0/8/130873965/debol.pdf
    • http://resultsorrefunds.com/uploads/1/3/0/6/130639800/5e40b06868d7686.pdf
    • http://muscarii.com/uploads/1/3/0/5/130590177/3354301.pdf
    • http://cocorosaemporium.net/uploads/1/3/0/2/130272932/02c74c7e3347d5.pdf
    • http://kimberlysimpkins.net/uploads/1/3/0/7/130776688/3458089.pdf
    • http://yecmonty.com/uploads/1/3/0/5/130588390/7132198.pdf
    • http://authenicwellness.com/uploads/1/3/0/6/130621044/2768224a62.pdf
    • http://jjjandkconstructionllc.net/uploads/1/3/0/4/130476887/4396981.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_off0000b033.bin
df36e30f0aab5fd931a940aa27776a9438d50c284eb2a20e9a0b643f12659461		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB033 8880 bytes

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