Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a8d676e420b39c3…

MALICIOUS

PDF

85.4 KB Created: 2021-03-09 06:36:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ff01d292a0612a124dc0e5a7de1d0e22 SHA-1: e72a6b95f6345d5d182590b89258ae7a06e4edb5 SHA-256: 2a8d676e420b39c3b87599519598397bcfe56e6f5c4cd43f2c55c940ae43d022
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a heuristic indicating a mass external link farm, with one of the primary links pointing to a suspicious domain. The document body, though heavily obfuscated, suggests a lure related to Excel spreadsheets. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports a malicious intent, likely to redirect users to phishing or malware hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://gimoguvi.ru/123?utm_term=how+to+add+checkbox+in+excel+spreadsheet PDF link annotation
    • http://tezibif.mygamesonline.org/2011_dodge_avenger_heat_tire_size.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/phylum_protozoa_notes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tobaziw/cbr_bike_race_video.pdfIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_086ef4938b5948c7ab05402c64b640a7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/does_michael_die_in_the_godfather_3.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/fusuwumaga.pdfIn PDF document text
    • https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_213cce0a5c7a4e8c85fe7d6311618d87.pdf?index=trueIn PDF document text
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_8344c0822f9f42d29a2299de6842233a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f92411-45d6-4f82-99d8-316ae1a9e133/74691847259.pdfIn PDF document text
    • https://d4f1f58f-bd44-402a-a4b0-a3aa01e36dbf.filesusr.com/ugd/dffefa_d6c4dcbf29df408fb3c725e5fed7c4bb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/96523645057.pdfIn PDF document text
    • http://zupitatip.atwebpages.com/jetukifejawok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8677cd3c-677b-4f45-a938-04924dfd3459/76476619249.pdfIn PDF document text
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_e1d0e55f34f943e8847cab7f4f4712cb.pdf?index=trueIn PDF document text
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_64d1bbdce86e421f956cc2ccfe393521.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/revax.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/cg_movies_full.pdfIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_722b123ac59147ba944468f39ff2d857.pdf?index=trueIn 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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FF 2952 bytes
SHA-256: cb9072f881c1fe0ad8900bbcc5a20a23fabb306412f64e001cac76c2a9509f2c
font_01_sfnt_off0000ed8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8E 5276 bytes
SHA-256: bdb1afb8fd5a2165c3255b22e8cff7f716ec4b212b5dacbcd3e448624904ff31
font_02_sfnt_off0000ff73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF73 10688 bytes
SHA-256: 1dcb31a2f30a612e196624f483d8115482757a6b080f4e9282a0cd3283e2fa59
font_03_sfnt_off00012456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12456 16140 bytes
SHA-256: 5bfda07072dd2e1b0df7f1680a75ba616774ec51e1a09c257f000ba239241e1c
font_04_sfnt_off00013952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13952 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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