Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bb06986ad06993d…

MALICIOUS

PDF

45.4 KB Created: 2020-03-26 04:10:20 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 523c6dcc0793de63555497b390c7ff11 SHA-1: 09cfd5e84dd391719300e2e11edb5f28e1388ce5 SHA-256: 4bb06986ad06993d83b8c3d1aa25f1648a478ccf91931b0cf1d979cd6cdf8f29
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The document body, though partially corrupted, contains text related to educational material and the wkhtmltopdf application, which is often used to generate PDFs from HTML. The embedded URLs point to various domains, many of which appear to be part of a coordinated link farm. The primary intent appears to be directing users to these external sites, likely for phishing or malware distribution.

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://chelseaishungry.com/uploads/1/3/0/5/130550888/130550888.html#material+didactico+luna+quinto+grado PDF link annotation
    • http://www.starkmedia.services/uploads/1/3/0/9/130969238/1441384.pdfIn PDF document text
    • http://yurspace.com/uploads/1/3/0/6/130639953/gikalivakaw.pdfIn PDF document text
    • http://m.transformationlifecoaching.net/uploads/1/3/0/6/130605312/zokuro_vopusesetoza_najowe_soxerodad.pdfIn PDF document text
    • http://alternativerecoverysolutions.com/uploads/1/3/0/6/130620375/vovixivog.pdfIn PDF document text
    • http://bluejeanslifestyle.com/uploads/1/3/0/2/130289409/sukefijirazod.pdfIn PDF document text
    • http://www.magicalponyadventures.com/uploads/1/3/0/7/130776409/roduzarafatukiduwo.pdfIn PDF document text
    • http://thepracticeproject.org/uploads/1/3/0/7/130738948/xuzibowozalupijuses.pdfIn PDF document text
    • http://bakerbeesweets.com/uploads/1/3/0/7/130776249/robuzo.pdfIn PDF document text
    • http://ouradcollective.com/uploads/1/3/0/2/130287266/romenojurinulip.pdfIn PDF document text
    • http://smtp.villageofhopeministries.org/uploads/1/3/0/5/130588502/5b2672.pdfIn PDF document text
    • http://farewell.international/uploads/1/3/0/3/130313108/fafuxoweso-finovenumivu-godut-lujupupus.pdfIn PDF document text
    • http://energiasenal.com/uploads/1/3/0/4/130483728/xejasazimu-nosanusetid-wutizepujexe-pojitewavu.pdfIn PDF document text
    • http://mcneillfmllc.com/uploads/1/3/0/4/130435877/0204b1a.pdfIn PDF document text
    • http://hostmaster.getpregnantcoach.com/uploads/1/3/0/7/130775261/kezume_sijinar.pdfIn PDF document text
    • http://www.lindsayschluter.com/uploads/1/3/0/5/130551021/sozunoradakumuzabak.pdfIn PDF document text
    • http://henriettamoore.net/uploads/1/3/1/3/131383754/3dd88.pdfIn PDF document text
    • http://teamdare2dream.com/uploads/1/3/0/5/130551994/2a232.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 6

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_off00006e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E88 9852 bytes
SHA-256: cdf31a7aba59d5fac7e929d5c1cb467c35b9d551ff40a63fa62bef7b332ddef9
font_01_sfnt_off0000915c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x915C 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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