Malicious PDF — malware analysis report

Static analysis result for SHA-256 427962c57f48a38f…

MALICIOUS

PDF

74.8 KB Created: 2021-02-13 11:26:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d9f358d3023b283293750aa1e0179d2e SHA-1: 9b78f3e63ff32ea9538b42740993a46899e28902 SHA-256: 427962c57f48a38f2c5f43153e87810cac5408f7bee4c014f2b03c6176758a71
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 0.9998

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://maypoin.ru/wix?keyword=falling+slowly+piano+sheet+music+free+download PDF link annotation
    • http://tgesheff.xyz/67600833972negcn.pdfIn PDF document text
    • http://virona.org/stickman_fight_magic_brawl_legends_codesq0cag.pdfIn PDF document text
    • https://laximazerafa.weebly.com/uploads/1/3/4/2/134235816/dugorebibujav_durenida_zuraw.pdfIn PDF document text
    • https://delovamubikener.weebly.com/uploads/1/3/4/7/134707073/kasapedaju_nomosor_wemelevoxukuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366045/normal_5fc9ced57e5bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453551/normal_5fee4ac0b71c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464319/normal_5fe7f66164c37.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/dje6eig/tarot_cards_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481162/normal_5fe5dcc06b0f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466367/normal_5fdf649f80c68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416494/normal_5ff7f962d6a13.pdfIn PDF document text
    • https://bipinudaw.weebly.com/uploads/1/3/4/7/134718108/6147136.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/bjghiWc/utility_knife_money_clip.pdfIn PDF document text
    • http://apkweb.net/69634658341gso5z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/scientific_calculator_free_for_windows_8.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/apk_spotify_mod_premium_terbaru.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_off0000e6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C4 5716 bytes
SHA-256: 386b03d1bf9d0441ecb480fbc7b21529ad4a3cafecc46ef4c55a1c2097975696
font_01_sfnt_off0000fa29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA29 10428 bytes
SHA-256: 68807290b1fdf9d873ef84be8dc3ae5b930db5627568a13aaa20a1ee75c2ce7a

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