Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6bba62db1acb45d…

MALICIOUS

PDF

65.3 KB Created: 2020-03-22 08:47:55 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 6166482c651556a148585cc67f2e087d SHA-1: 57ac0ba502d763b4ba2e5741d6cacbac37d6d490 SHA-256: c6bba62db1acb45db936e84c0a19375493f6433e0332c3e5e93b3adef78061eb
96 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. These links point to various domains, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, contains a reference to 'Bhagavad gita as it is in hindi book' and the wkhtmltopdf application, which may be a lure. No scripts were extracted from this sample.

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://kimengdahl.net/uploads/1/3/0/7/130775647/130775647.html#bhagavad+gita+as+it+is+in+hindi+book PDF link annotation
    • http://mta-sts.mail.canisteowesleyanchurch.com/uploads/1/3/0/4/130477083/447d972.pdfIn PDF document text
    • http://magnoliaponds.biz/uploads/1/3/0/5/130551185/8566334.pdfIn PDF document text
    • http://scout-troop76.com/uploads/1/3/0/6/130620380/3649776.pdfIn PDF document text
    • http://rjwknnkaasdasagg.net/uploads/1/3/0/5/130540116/8260065.pdfIn PDF document text
    • http://sigoaprendiendo.com/uploads/1/3/0/3/130323159/fipefip_taxirudi_sijejux_mebulakadotirog.pdfIn PDF document text
    • http://tshouse.org/uploads/1/3/0/6/130605030/4fff3e.pdfIn PDF document text
    • http://www.cardcardgroup.com/uploads/1/3/0/2/130287283/rifufifu.pdfIn PDF document text
    • http://blackbooktales.com/uploads/1/3/0/4/130483477/4168582.pdfIn PDF document text
    • http://westendbarbershop.com/uploads/1/3/0/7/130739039/nogitofuvavobes.pdfIn PDF document text
    • http://jogen.org/uploads/1/3/0/6/130620760/kadijutaxozut-wedakaka.pdfIn PDF document text
    • http://goldentherapies.org/uploads/1/3/0/2/130271042/kuwawavoxekos.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000897c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x897C 7636 bytes
SHA-256: 7c5c4f7b1f03fdd7dd28bf42c8165901b88efef0ac1859088ea38f120ad32194
font_01_sfnt_off0000a752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA752 1388 bytes
SHA-256: 1723f1ced37cc89d69e30f3df6281c5e5fb8989544fd4587aa75b00c91af2fd0
font_02_sfnt_off0000aef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF0 16028 bytes
SHA-256: ca889182d22413b1a5b6446cd5d954c095bfc2c8b2fec1022b19199100617195
font_03_sfnt_off0000c33e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC33E 17700 bytes
SHA-256: 7c288b738a6e078a0b033dcd94b0ef897fe49044a5db31641c8b938865ced41b

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