Malicious PDF — malware analysis report

Static analysis result for SHA-256 36d1834d06c8eb4f…

MALICIOUS

PDF

48.4 KB Created: 2020-03-29 11:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 8bda9ca00a54c9c89f849dbc620934d3 SHA-1: 0515241cefb4c7bdca153bab6b2b6483a1e0ba59 SHA-256: 36d1834d06c8eb4f6e3b1ba4a6f8c5f5c70a9a9f2dbacd061355cef1210972e8
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, identified by the PDF_SEO_LINK_FARM heuristic. These links point to a network of domains, many of which appear to be part of a link farm designed to artificially inflate search engine rankings. The document body contains text related to 'Pie chart worksheets ks2 pdf', suggesting a lure to attract users searching for educational materials. The primary intent appears to be redirecting users to these external PDF files, likely for advertising or to host further malicious content.

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://cecilyeiferle.com/uploads/1/3/0/4/130436234/130436234.html#pie+chart+worksheets+ks2+pdf PDF link annotation
    • http://sincity.world/uploads/1/3/0/5/130588663/xibodimilevus.pdfIn PDF document text
    • http://wiedensharedservices.com/uploads/1/3/0/8/130874588/3909768.pdfIn PDF document text
    • http://bankownedhomesidaho.com/uploads/1/3/0/7/130775507/newunitobogad-dinitinif.pdfIn PDF document text
    • http://card-on-blue.com/uploads/1/3/0/5/130538949/gefiju.pdfIn PDF document text
    • http://daxandjanine.com/uploads/1/3/0/4/130476342/ruvegamewewepaj.pdfIn PDF document text
    • http://mycleverhotnewproducts.com/uploads/1/3/0/6/130639266/eab7a21f.pdfIn PDF document text
    • http://providentdp.com/uploads/1/3/0/5/130543494/bizawo_wejakuru_rikodog_tobelu.pdfIn PDF document text
    • http://sbhfinancial.org/uploads/1/3/0/3/130313135/dilebedasidosaf_kukixifedopode_nizananu_pusatuvuguxefi.pdfIn PDF document text
    • http://kokorokenkyukai.com/uploads/1/3/0/4/130435978/85a8ac33.pdfIn PDF document text
    • http://emilybridghamportfolio.com/uploads/1/3/0/2/130292104/jumalevufiku-zilalifanusixu.pdfIn PDF document text
    • http://lascrucesbirthdayandweddingcakes.com/uploads/1/3/0/5/130588415/2b4c44a.pdfIn PDF document text
    • http://jachuberman.com/uploads/1/3/0/8/130813866/borikilobos_negixezawif_netewitek_vamezoditubod.pdfIn PDF document text
    • http://tadbservicesinc.com/uploads/1/3/0/7/130738801/xowalolagosotisape.pdfIn PDF document text
    • http://webdisk.singaporedrumshop.com/uploads/1/3/1/4/131437503/kexojosizumu_latawug_xogusa.pdfIn PDF document text
    • http://psmcconsulting.com/uploads/1/3/0/2/130287533/7541580.pdfIn PDF document text
    • http://savoiedelacy.com/uploads/1/3/0/7/130776262/b6966c8444a.pdfIn PDF document text
    • http://piperikuk.com/uploads/1/3/0/9/130969019/0e12607828.pdfIn PDF document text
    • http://meridian-dcg.com/uploads/1/3/0/7/130739313/wiwufidojet.pdfIn PDF document text
    • http://londoneastjazznetwork.org/uploads/1/3/0/2/130288864/tinarebanurap-kisipuvababox-jokiled-vabarofegum.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 7

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D8 7732 bytes
SHA-256: 36b558bcbefaab7bd0b64c1e642c7b96ef4a1f25ca4a5f5198b21c58d88dcbb1
font_01_sfnt_off00009118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9118 3036 bytes
SHA-256: 8380f0bdeb8964bf2467a56a0e6eeafa6deb1e629a7e09bf2a4d08f4046ea7c8
font_02_sfnt_off00009dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DAD 16336 bytes
SHA-256: 101447ec0f1ff9a166538e0d663148276e3a4fc1aded7589db46e8db93931e1f

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