Malicious PDF — malware analysis report

Static analysis result for SHA-256 669b38a6882d9f09…

MALICIOUS

PDF

55.7 KB Created: 2020-10-15 03:28:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 844bd5a42e8479528ed45a15c0407a54 SHA-1: 2bcb755f62eecdac076457c91c19acf94f91f835 SHA-256: 669b38a6882d9f095c55dbf21a85d40012f1e4f79dd82827e4d131ce8c4ca02c
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.me/pify?keyword=excel+vlookup+user+guide+pdf In PDF document text
    • https://gidixelasulam.weebly.com/uploads/1/3/0/7/130739099/bff2299f02.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/910350.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/vunidixeviro_xitosujitupile_kadape.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/likanutavorolebonat.pdfIn PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/jojulibikax-bigefotigew.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/fcc3dcc8788bb23.pdfIn PDF document text
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/7613128.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/9d26b8b8.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/vaxujow_gebonem.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/df4649983.pdfIn PDF document text
    • https://taxajadotediru.weebly.com/uploads/1/3/0/8/130873824/xumavefodomagaw_vanogufuwarapo_nopokakakamu.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/6443274.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/tadapujilukabojap.pdfIn PDF document text
    • https://site-1042496.mozfiles.com/files/1042496/bakofesojejususevev.pdfIn PDF document text
    • https://site-1038694.mozfiles.com/files/1038694/lusoxigozibo.pdfIn PDF document text
    • https://site-1039305.mozfiles.com/files/1039305/54548366736.pdfIn PDF document text
    • https://site-1043653.mozfiles.com/files/1043653/zumozenafojuvaro.pdfIn PDF document text
    • https://site-1039547.mozfiles.com/files/1039547/luwiluwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f876b3d6dc17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367964/normal_5f8789da530d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f8780968d270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f878ca3b6ffb.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://cdn.shopify.com/s/files/1/0431/3923/5997/files/jedi_grand_masters_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9623/9006/files/19020687764.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000a9d2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA9D2 17216 bytes
SHA-256: 8758f62a0e5f679c29cd0ff23a26d0434d6d34a7a1bcba3d9f7ed076b50bee77
font_00_sfnt_off000073e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E7 4960 bytes
SHA-256: 96c61f89162d83b9e722e4b2f01ee41f67afb05513bcaaa55c7bd65fbaad72bf
font_01_sfnt_off000084df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84DF 10772 bytes
SHA-256: acdc863ca3418e9689d0a427bd067c4d036cf55188452c387af1f176a044f685
font_03_sfnt_off0000c2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D8 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3