Malicious PDF — malware analysis report

Static analysis result for SHA-256 08681cf55184c41c…

MALICIOUS

PDF

42.6 KB Created: 2020-05-23 20:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91d42fefeaa74357269c7ab8f148cfa7 SHA-1: e1bd418012f6ac6c435689bb78c5b25e7aad6f3d SHA-256: 08681cf55184c41c50a128f913921c79a3cffcb6a7f125569fa5d5daa5066a87
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

This PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The embedded URLs suggest a link farm or SEO manipulation tactic, aiming to direct users to numerous unrelated websites. The ML classifier strongly indicates malicious intent, likely to distribute further malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://eldoradopasadena.com/uploads/1/3/0/7/130738846/130738846.html#balance+exercises+for+stroke+patients
    • http://masonstreettextiles.com/uploads/1/3/0/9/130969357/1737259.pdf
    • http://connectedoneeducationllc.org/uploads/1/3/1/4/131407539/vegunuridabasa-zajavakarejam-fejik.pdf
    • http://sr-studenica.org/uploads/1/3/1/4/131406063/zifojopulo.pdf
    • http://walkerpavementcoating.com/uploads/1/3/1/8/131856097/vunalitif.pdf
    • http://localrvrentals.com/uploads/1/3/1/3/131379290/sizadadezegukan_gobolomawaf.pdf
    • http://setransformations.com/uploads/1/3/1/3/131398515/da6eaca.pdf
    • http://computersupportcolumbus.net/uploads/1/3/0/3/130323216/8781487.pdf
    • http://countrysidecommunications.net/uploads/1/3/1/3/131383743/4635766.pdf
    • http://mfcmasterframingcontruction.com/uploads/1/3/1/8/131871579/gikabowomakadifibibi.pdf
    • http://thewesgroupllc.com/uploads/1/3/1/3/131384255/fdcac923d5.pdf
    • http://pradallaw.net/uploads/1/3/1/0/131070695/lasenowiwofi-wajimunarijub-visojazugodivut.pdf
    • http://suzvoice.com/uploads/1/3/0/5/130541662/papigaxu_bunukag_kogazodenewefiv_nozesin.pdf
    • http://m.namiracine.org/uploads/1/3/0/4/130435551/munoduf_mirisesiru_razavimu_xaluxunolezasa.pdf
    • http://phoenixfeetreflexology.com/uploads/1/3/0/2/130289429/pizexozobigimuvevor.pdf
    • http://westwoodcondos.com/uploads/1/3/1/3/131398094/d6490c55.pdf
    • http://cstwholesalersinc.com/uploads/1/3/1/6/131636832/3298985.pdf
    • http://makingadifferencewithbriana.org/uploads/1/3/0/5/130544447/jidemanarodelid_kakok_vomiwosaxunoso.pdf
    • http://theencouragementroom.com/uploads/1/3/0/6/130604910/9029811.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c50.bin
40b9fe3085cd24d0aaa48f30efa0ad625259f71df0611543af77bd08c7ba7d47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C50 10088 bytes

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