Malicious PDF — malware analysis report

Static analysis result for SHA-256 23b5cebd87d8ce5f…

MALICIOUS

PDF

43.4 KB Created: 2020-06-03 19:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 487beed35c651ea830fa8af8dc563769 SHA-1: ed49d15f39862e8b6e48ea9c9276e27b9e9b34b7 SHA-256: 23b5cebd87d8ce5fed79240d8897dd49dd49631ea648cd3522a5a0fb74987c80
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. The document body, though partially corrupted, includes a URL that points to a Harry Potter-themed guide, suggesting a lure to attract user clicks. The primary intent appears to be directing users to a network of websites, likely for SEO spam 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://doohickeysonline.com/uploads/1/3/0/5/130590334/130590334.html#harry+potter+hermione+granger+cinematic+guide PDF link annotation
    • http://orlandoclearinspections.com/uploads/1/3/0/2/130272260/e828ec.pdfIn PDF document text
    • http://thefrizzyartist.com/uploads/1/3/1/4/131483153/vipenutox_wodejez.pdfIn PDF document text
    • http://vidmyride.com/uploads/1/3/1/4/131453637/8811736.pdfIn PDF document text
    • http://llunapallussa.org/uploads/1/3/0/7/130738914/benevixeg-mamide-rulomekogosame.pdfIn PDF document text
    • http://lakekathleenmachine.com/uploads/1/3/1/4/131406273/13a0688.pdfIn PDF document text
    • http://evanstoncaterers.org/uploads/1/3/0/3/130313167/lewiluz.pdfIn PDF document text
    • http://jreglobal.com/uploads/1/3/0/8/130873735/8097650.pdfIn PDF document text
    • http://kokomotansu.com/uploads/1/3/0/6/130621857/3c35c3.pdfIn PDF document text
    • http://naturallyhealthy.info/uploads/1/3/0/7/130740080/86c5465b3.pdfIn PDF document text
    • http://doohickeysonline.com/uploads/1/3/0/5/130590334/terms.htmlIn PDF document text
    • http://doohickeysonline.com/uploads/1/3/0/5/130590334/dmca.htmlIn PDF document text
    • http://doohickeysonline.com/uploads/1/3/0/5/130590334/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bujamabak.files.wordpress.com/2020/05/fexurexapaw.pdfIn PDF document text
    • https://nipavefa.files.wordpress.com/2020/05/65791878135.pdfIn PDF document text
    • https://fekebirap.files.wordpress.com/2020/05/70684788852.pdfIn PDF document text
    • https://fiwasaserop.files.wordpress.com/2020/05/37620387243.pdfIn PDF document text
    • https://vijugogazoxo.files.wordpress.com/2020/05/51409091685.pdfIn PDF document text
    • https://ritogogopo.files.wordpress.com/2020/06/sewelufiremorikitone.pdfIn PDF document text
    • https://gugotuka.files.wordpress.com/2020/06/zokokuwim.pdfIn PDF document text
    • https://forivugovov.files.wordpress.com/2020/06/wetotigafox.pdfIn PDF document text
    • https://riwozuxel.files.wordpress.com/2020/06/36431620248.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://scripts.sil.org/OFLIn 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_off00005925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5925 4060 bytes
SHA-256: 9545fd2ed398fde7c1a83c377aabf140eb79bacc9d077110c24251cb80d5aec4
font_01_sfnt_off0000669c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669C 10956 bytes
SHA-256: f999373aac255bbd4d1906bfc290e8bb390a7140b7550b1afeddef274e463bd2
font_02_sfnt_off00008a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6B 16384 bytes
SHA-256: 230df8017a85ea93a5c886159708d72349b7227190d262bf2e9082262302ac19

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