Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a3d50a6b8e3d27f…

MALICIOUS

PDF

47.2 KB Created: 2020-03-09 14:23:13 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: c4fa71732cd70c31c9a5b6698709384e SHA-1: a4a4240607175a8fac1b9a7eae45e95adacffe07 SHA-256: 9a3d50a6b8e3d27fce797326819ffa3389394e4287f4ed20ec1f84f13413913a
104 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary URL points to an HTML file, which likely serves as a landing page to redirect users to a link farm of other PDF documents. The presence of a 'Download Button' heuristic further suggests a lure to encourage user interaction with these links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bahamasaugustllc.com/uploads/1/3/0/5/130588349/130588349.html#storming+norming+forming+performing+tuckman PDF link annotation
    • http://dns.mckayscyclecreations.com/uploads/1/3/0/5/130551386/7391368.pdfIn PDF document text
    • http://powersbodytraining.com/uploads/1/3/0/5/130539759/bitefowotilaliguj.pdfIn PDF document text
    • http://yoshimacorp.com/uploads/1/3/0/7/130775154/vujumasosonevu_zunufumeles_zolepizuzo.pdfIn PDF document text
    • http://deliverresultsnow.com/uploads/1/3/0/2/130287462/karula-xexesurizi-xepoke.pdfIn PDF document text
    • http://skittishboy.com/uploads/1/3/0/4/130476778/1f59da1e88e1.pdfIn PDF document text
    • http://sadtown.com/uploads/1/3/0/2/130289679/2972785.pdfIn PDF document text
    • http://islamic-global.net/uploads/1/3/0/3/130323984/782e48698ac.pdfIn PDF document text
    • http://www.norbyco.com/uploads/1/3/0/8/130814066/68839f5.pdfIn PDF document text
    • http://esraadesigner.com/uploads/1/3/0/8/130874050/08cc16ae54ec.pdfIn PDF document text
    • http://www.mkbrei.com/uploads/1/3/0/3/130379589/831899.pdfIn PDF document text
    • http://hypnobirthmelbourne.net/uploads/1/3/0/5/130550749/xoduwikenogefo.pdfIn PDF document text
    • http://www.sundayyoung.com/uploads/1/3/0/4/130483617/0892fca0.pdfIn PDF document text
    • http://agavepress.com/uploads/1/3/0/7/130776063/5774252.pdfIn PDF document text
    • http://flying-switzerland.com/uploads/1/3/0/4/130435631/ce8bf1407c2af2.pdfIn PDF document text
    • http://www.ctesteve.com/uploads/1/3/0/6/130605278/wasezilodabofusadug.pdfIn PDF document text
    • http://blowingrocksushi.com/uploads/1/3/0/5/130540281/mogapavavawis.pdfIn PDF document text
    • http://edenstudioart.com/uploads/1/3/0/8/130874248/15aca.pdfIn PDF document text
    • http://mystickamis.com/uploads/1/3/0/4/130488542/0051c0f.pdfIn PDF document text
    • http://shrinesearch.com/uploads/1/3/0/4/130476657/dejikupuk_dekapakofipojot_taguximolixawi.pdfIn PDF document text
    • http://lizbusch.com/uploads/1/3/0/6/130639180/gofisonudibo.pdfIn PDF document text
    • http://mail.ledgercoffee.com/uploads/1/3/0/7/130740190/9811706.pdfIn PDF document text
    • http://sue-rodgers.pleasingfood.com/uploads/1/3/0/2/130272072/naketuburex_jufegu.pdfIn PDF document text
    • http://sofiaqin.com/uploads/1/3/0/2/130289693/282f73136eec3df.pdfIn PDF document text
    • http://www.cccourierexpress.com/uploads/1/3/0/4/130489080/mujukodem.pdfIn PDF document text
    • http://dynamichealthsystem.com/uploads/1/3/0/7/130740117/4989001.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_off00008603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8603 8072 bytes
SHA-256: 681fc8782b283572de67678bc6a661165ba01deedc43f5ef145c0003fffaa7b1
font_01_sfnt_off0000a4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4C5 2652 bytes
SHA-256: e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc

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