Malicious PDF — malware analysis report

Static analysis result for SHA-256 f92a281c0f17557b…

MALICIOUS

PDF

51.1 KB Created: 2020-10-17 20:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b639b3b90d931bf60267c6585f213f4c SHA-1: 8e29d988ba2936080418318234ee5afd060f92dd SHA-256: f92a281c0f17557b458923289eaf375e73d1d3f45cb9b7ea9d5b54388a13a462
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF file contains numerous links to external resources, including a known malicious redirector at https://gettraff.ru/123?keyword=rotativa+pdf+mvc+tutorial. The document also includes a lure to execute commands by instructing the user to copy and paste content into a shell, indicating an attempt to facilitate further malicious activity. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://gettraff.ru/123?keyword=rotativa+pdf+mvc+tutorial In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380088/normal_5f8b205559902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369516/normal_5f8a9ee3c322b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379035/normal_5f8a48a56e00d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f89db8f4e335.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f870133a973d.pdfIn PDF document text
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/d6be838.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/vidabaranibul-rivenijenudad-kiwon-vitobugozukiriv.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/2345247.pdfIn PDF document text
    • https://wujibinofowe.weebly.com/uploads/1/3/1/3/131383737/zupapozotor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5f89883c8f120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f872a3d35521.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377938/normal_5f8a5ddad25b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369776/normal_5f88fec0410fa.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/1/0476/7396/6758/files/gun_mayhem_1_unblocked_6969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/393cb308-a62b-498c-9188-a172a76d4cf8/xarotonunizebadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c163d84a-6370-4f0b-949f-eae98c316b34/73388190549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6572c9d-a3e9-4e13-b226-3b0cc388a957/kixafalumomujugetakelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a40152f6-d6c2-4676-a121-ef35d3f81ce0/mizejajazilawejuxipuk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000713c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x713C 4848 bytes
SHA-256: 2651b3087c9610815db11ec3c41e093d9dc186786e81842b7f502fcb658d254b
font_01_sfnt_off000081bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81BF 15120 bytes
SHA-256: 4bde62ab06f65395c5f29ce4e71666194e4fdb0ed3c44637d36085e6c0536d80
font_02_sfnt_off0000b17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB17D 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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