Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a82298793739e7d…

MALICIOUS

PDF

75.0 KB Created: 2020-11-14 03:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 066cab519e44db8204f49c9769e2bdcf SHA-1: ea898a98a53b9d57fb691d3de50c90467eeef4fe SHA-256: 0a82298793739e7d51608e2b173fb122f7aa0623653855da521026c771267b6b
136 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to S3 buckets, suggesting a link farm or SEO manipulation tactic. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely provides a password to decrypt a malicious archive, a common technique to evade initial gateway scanning. While no scripts were directly extracted, the presence of PDF_URI and embedded URLs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://trafftec.ru/strik?utm_term=descargar+journey+pc+full+espa%25C3%25B1ol PDF link annotation
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/vojefivez.pdfIn PDF document text
    • https://sibomimotilelib.weebly.com/uploads/1/3/4/2/134235458/166df15f15356.pdfIn PDF document text
    • https://roninuvanajeg.weebly.com/uploads/1/3/1/3/131379749/34935e249.pdfIn PDF document text
    • https://vadazexo.weebly.com/uploads/1/3/4/6/134646317/zasejune.pdfIn PDF document text
    • https://juwememuju.weebly.com/uploads/1/3/4/5/134523402/mijarerusito.pdfIn PDF document text
    • https://sobepaded.weebly.com/uploads/1/3/4/3/134305425/6e0df2d878e514c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_5f87864ed3675.pdfIn PDF document text
    • https://sexozorojupur.weebly.com/uploads/1/3/4/3/134390270/vikadejigozomoz-tavisufonaral-rufuteruvetafu-tuzizitawol.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/palikuvexake/latosokazadepogoxilit.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/koxulinav.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/links_awakening_walkthrough_hibiscus.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/phonetic_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/yalla_shoot_app_android.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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B0 3312 bytes
SHA-256: 0286741f55fd76a0ad00b7c2daba1155e6345911f929bfb8843d6884401956bf
font_01_sfnt_off0000ce74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE74 5328 bytes
SHA-256: 1a36983c5e7bce4678d52fcae3b624098cd6bd2306e36bd7a9ec30c6a7ac4689
font_02_sfnt_off0000e067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE067 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_03_sfnt_off0000e8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F5 11000 bytes
SHA-256: 1e90c63f96d50a3e4d5e535e5255bf06634c4364c1e76e0fb112af76971ae02a
font_04_sfnt_off00010e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E64 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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