Malicious PDF — malware analysis report

Static analysis result for SHA-256 25aed634ca3c7dd4…

MALICIOUS

PDF

43.1 KB Created: 2020-03-09 02:41:49 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 400403babb456450b51ea41c844e2103 SHA-1: cd64e1c412a56067f02c2d109338a633b7b8ea4f SHA-256: 25aed634ca3c7dd432a54b0081a16641fb337754bcdc908f9a0fdc51eecac125
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to similarly structured URLs on different domains. The document body text, though heavily obfuscated, contains references to inserting text boxes in PDFs and includes several of these external URLs. This suggests a link farm or SEO poisoning tactic designed to drive traffic to potentially malicious 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://xianjinduboyouxi.br3h.com/uploads/1/3/0/5/130551130/130551130.html#insert+text+box+in+pdf+file PDF link annotation
    • http://anzics2019.nz/uploads/1/3/0/2/130270971/jasalafebokabegelup.pdfIn PDF document text
    • http://carsforfood.com/uploads/1/3/0/7/130776478/218a0.pdfIn PDF document text
    • http://webmail.livestyliv.com/uploads/1/3/0/6/130603916/1678712.pdfIn PDF document text
    • http://projectdreamport.info/uploads/1/3/0/8/130813366/3948659.pdfIn PDF document text
    • http://boystownchicagoseries.com/uploads/1/3/0/7/130776162/3341802.pdfIn PDF document text
    • http://www.rx-fitnessmalaysia.com/uploads/1/3/0/5/130588858/minixanizi.pdfIn PDF document text
    • http://roslecontractor.com/uploads/1/3/0/2/130287278/gazonizupixur.pdfIn PDF document text
    • http://www.tirologistics.com/uploads/1/3/0/4/130483200/widupubilawe_sosanumi_rivuwikes_xojim.pdfIn PDF document text
    • http://mail.integraled.org/uploads/1/3/0/5/130539004/lavik_suvodeb.pdfIn PDF document text
    • http://natureiraqfoundation.org/uploads/1/3/0/7/130740617/717875db8.pdfIn PDF document text
    • http://wenyingzhizunyule.br3h.com/uploads/1/3/0/6/130621020/eeb39.pdfIn PDF document text
    • http://grooveshoprecords.com/uploads/1/3/0/3/130379307/3903039.pdfIn PDF document text
    • http://lcofitness.com/uploads/1/3/0/7/130739349/tagivowas.pdfIn PDF document text
    • http://stringsandsprings.com/uploads/1/3/0/4/130483178/4569558.pdfIn PDF document text
    • http://www.agilbertphotography.com/uploads/1/3/0/5/130588518/guwijemuvopafilenu.pdfIn PDF document text
    • http://mynicheblog.com/uploads/1/3/0/4/130476078/ponot.pdfIn PDF document text
    • http://ventonconsulting.com/uploads/1/3/0/8/130813738/xupipab.pdfIn PDF document text
    • http://out-the-back-door.com/uploads/1/3/0/4/130436313/b505c167e2.pdfIn PDF document text
    • http://bgooddesignllc.com/uploads/1/3/0/6/130604488/fudalud.pdfIn PDF document text
    • http://www.dresswithoutstress.help/uploads/1/3/0/6/130620470/4cfa45c520.pdfIn PDF document text
    • http://webmail.katetrepagnier.com/uploads/1/3/0/8/130813033/rogusamuxubisibam.pdfIn PDF document text
    • http://nursevisit.org/uploads/1/3/0/3/130313306/xovobivedufunititodo.pdfIn PDF document text
    • http://edithbennett.com/uploads/1/3/0/7/130739204/6931876.pdfIn PDF document text
    • http://www.beingmodish.shop/uploads/1/3/0/3/130379307/b375beeebeeed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000762f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x762F 7496 bytes
SHA-256: ee7fdc4f58aacb5064292375cb2c653e627ee030ba2f66dedaf87120d1d1ecf3
font_01_sfnt_off00009387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9387 2600 bytes
SHA-256: 915baeb1e29b1296448dc25187851e9706b77add1d29a836586dd6d4826066cd

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