Malicious PDF — malware analysis report

Static analysis result for SHA-256 94dcd0a4a19eec8c…

MALICIOUS

PDF

55.1 KB Created: 2020-10-15 03:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 84904a8ed82a7b887168ef39f3bcf515 SHA-1: abf5c755dac2f59fbebd71ef6c63e0740ae7f69c SHA-256: 94dcd0a4a19eec8c8bbeb20e325b8d07e2344c1bd4ed6d2017fded04d3edf111
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to known malicious redirectors or disposable hosting. The document body, though partially corrupted, suggests a lure related to a "TV guide" to entice users to click these links. The ML classifier also strongly indicated maliciousness.

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://ggtraff.ru/123?keyword=fox+footy+tv+guide+today In PDF document text
    • https://punadojum.weebly.com/uploads/1/3/2/6/132680976/gomeliko.pdfIn PDF document text
    • https://kuwofepex.weebly.com/uploads/1/3/2/7/132740654/riben_gudodow.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/7d7b6617ab8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f877c7f826b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f87157dccff5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5f87671659c83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f8723cf6cad3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f8750a51f359.pdfIn PDF document text
    • https://site-1043611.mozfiles.com/files/1043611/gibupanejipagajekubunoneb.pdfIn PDF document text
    • https://site-1043800.mozfiles.com/files/1043800/fupukinezok.pdfIn PDF document text
    • https://site-1041183.mozfiles.com/files/1041183/83984316213.pdfIn PDF document text
    • https://site-1038614.mozfiles.com/files/1038614/55540967228.pdfIn PDF document text
    • https://site-1041866.mozfiles.com/files/1041866/9307178649.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/e29f4b1a-34e1-4ebc-af91-cf716a577923/89129493050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16b47583-93ff-4367-950c-683f88c74196/fefubilaraxesof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c870feb-338d-47b7-8e13-6b59638aa289/jisobexofaxozamawavipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfcf06b8-bdb0-42cb-83bd-4f8290757bb3/bolaxux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1f6dad3-a09c-43a0-b2d0-0b98823d085a/zixuzujojugejaratumuvezol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/401feed7-defa-45f8-a54d-7af12bdcbf8c/74515543847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/931d639b-9fd6-4b7e-aca8-4a94c7d50cde/riletuxaxudisuxidutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be3a5e47-c9e1-4173-b3b9-588bb30590f1/nijesulovuloxugi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A32 4604 bytes
SHA-256: 9395f0c0d85f9471169e3ad7d5de4ddfd4edae82e5d9907a86fe253130a378b8
font_01_sfnt_off00007a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A49 4952 bytes
SHA-256: 20a4d78aee326105d4e8d069264d70db991a2982868d7535d5bb53f91504eed1
font_02_sfnt_off00008b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4F 1872 bytes
SHA-256: 47e6a159e34c7be90a25a86dd03683fa1f9c13dd651e41092b16e9cfb54f790c
font_03_sfnt_off0000945d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x945D 10560 bytes
SHA-256: 7a022ef25f45a5c1d6c88dc5668e3a51f40837d06e5473998ab6db01cd4224f9
font_04_sfnt_off0000b8c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8C8 16092 bytes
SHA-256: 2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140

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