Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c5f6a772cf5e032…

MALICIOUS

PDF

47.1 KB Created: 2020-11-09 12:52:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: bcdc959cb57752b11eba99f322a6bb1e SHA-1: df97f8dfc73d218c7e0b50a7a70c10f6aa73661c SHA-256: 3c5f6a772cf5e032098937e878a5ac8cb8117ae4cac94e58d8b07cf11a137bb2
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 https://traffnew.ru/aws?keyword=des+moines+register+all+state+football+2018 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462038/normal_5fa529587d0b8.pdfIn PDF document text
    • https://sufeneva.weebly.com/uploads/1/3/4/5/134594805/5435660.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/sivodam-rosejezoj-xopefap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368481/normal_5f99b0572fe74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382412/normal_5f8fbd5047564.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369164/normal_5f8db1e4542b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5f8b930164dba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446027/normal_5fa08ebb688e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372354/normal_5f8db833981f8.pdfIn PDF document text
    • https://wepeweguwerixum.weebly.com/uploads/1/3/1/8/131856135/db97b4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_5f8de42c18af5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f87133a82d62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376354/normal_5f94c07966062.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/101ff943-c413-4a3f-a31d-ce7cc2a31d50/xuworifitivalumesipidefel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cba9516-fd4d-4142-b600-3ece86f3d6a1/classic_resto_druid_leveling_guide.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7486 5748 bytes
SHA-256: 0f4646dbb791dbe4f5b0d3728efbf4cfcf657042d816a721603064cf40a831b2
font_01_sfnt_off00008802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8802 11468 bytes
SHA-256: 5450f8de42a571e437da4c6a74f8eb0441efc387cc3e77a48d110807bcf2672d

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