Malicious PDF — malware analysis report

Static analysis result for SHA-256 e52b55761bf27f1c…

MALICIOUS

PDF

51.5 KB Created: 2020-04-03 16:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-12-25
MD5: 32aa0294da21cb8e3c659e91e8693ca0 SHA-1: 8ebf43a7effefa7c2fb6a35ec150b2dceca48dd1 SHA-256: e52b55761bf27f1c9326489aacec7bf9a56f9033235039f1e40ccbbed8e34634
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to other PDF files on different domains, suggesting a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs indicates an attempt to direct the user to potentially harmful content. The document body itself contains a title related to Islam and Muslim expansion, likely a lure to disguise the malicious intent.

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://castmarksa.net/uploads/1/3/0/5/130589218/130589218.html#cuadro+sinoptico+del+islam+y+la+expansion+musulmana PDF link annotation
    • http://nhcohousing.org/uploads/1/3/0/7/130739387/fivaxamusasikaluxu.pdfIn PDF document text
    • http://kathrynomune.com/uploads/1/3/0/4/130477719/fedap.pdfIn PDF document text
    • http://wellnessundertheoaks.com/uploads/1/3/1/3/131379231/3287260.pdfIn PDF document text
    • http://rcbshopping.com/uploads/1/3/0/6/130604666/vadugijogikaxobiboza.pdfIn PDF document text
    • http://counsellingkuwait.com/uploads/1/3/0/4/130483480/b1936.pdfIn PDF document text
    • http://jaddellconstruction.com/uploads/1/3/0/2/130288431/biget.pdfIn PDF document text
    • http://svetlanadilman.ru/uploads/1/3/0/6/130605432/tobizetifata-getevowone.pdfIn PDF document text
    • http://amd11z.com/uploads/1/3/0/7/130738708/fevupuga_mebuxilot.pdfIn PDF document text
    • http://dayseye.org/uploads/1/3/0/7/130740323/kadabezivokofil.pdfIn PDF document text
    • http://dentalhomegeorgia.com/uploads/1/3/0/7/130738537/zekupowarefob_tubidadezolig_wajubunu.pdfIn PDF document text
    • http://klikbooth.com/uploads/1/3/0/5/130551154/rekerub_suseki_zezeme.pdfIn PDF document text
    • http://katiesopocidrake.com/uploads/1/3/0/4/130435601/kujarebotibifib.pdfIn PDF document text
    • http://vulcanonline.org/uploads/1/3/0/5/130588769/a9f5a739f3948.pdfIn PDF document text
    • http://raylaurendesign.com/uploads/1/3/0/5/130588616/4da4d021b1b066a.pdfIn PDF document text
    • http://karinaterrazas.com/uploads/1/3/1/4/131453993/nuxol.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000087d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D4 9568 bytes
SHA-256: b5e2eec323cb157a6f6e27f0566a9fb18affe2dfae4526ae82fa45eb8aabda0e
font_01_sfnt_off0000a9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9CB 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

Open this report in the interactive analyzer, or submit your own file for analysis.