Malicious PDF — malware analysis report

Static analysis result for SHA-256 073805ccd396777a…

MALICIOUS

PDF

54.5 KB Created: 2020-11-07 17:54:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6f2994bad2dc68d81d757596387e95d3 SHA-1: 144954eed04938e3325a50a2ed98143d93893b6b SHA-256: 073805ccd396777adb2a2620f4336e5d57db1b882ee3e689a347c7b1ed7467ad
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffset.ru/123?keyword=old+rca+victor+radio+value PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378160/normal_5f98663f20f18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_5f93f59961f02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420907/normal_5f987b433b3b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383452/normal_5f9231d2bac0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_5f93065d5f65b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393179/normal_5f97454c2e5da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373261/normal_5f9e75c14162f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414486/normal_5f9814665912d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dobaxululon.files.wordpress.com/2020/11/23649577647.pdfIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/68091325827.pdfIn PDF document text
    • https://nodumizid.files.wordpress.com/2020/11/west_side_story_book.pdfIn PDF document text
    • https://nosixaxuk.files.wordpress.com/2020/11/robert_merle_la_mort_est_mon_mtier.pdfIn PDF document text
    • https://vadazigifexe.files.wordpress.com/2020/11/merozasopegujibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42a0f986-44d4-4c29-a609-b8a7d16a08cf/moparekebudovafovu.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/jufasi.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_off0000969a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x969A 4844 bytes
SHA-256: e473dd2da8bf8fb2880cf4b5758118b28a4bf3bed150b6546cddb94ac9f86739
font_01_sfnt_off0000a724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA724 11364 bytes
SHA-256: 84e52671806dd38ec0da1447fdb4dea6d7aef56502abeb595563a81d13f5eab6

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