Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5ba6cc2fafe0185…

MALICIOUS

PDF

46.7 KB Created: 2020-10-29 03:37:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 45f1dc45e06ddb73f9d9e314b4425334 SHA-1: b100f6ef02c954af9952ed60bdd5987f3e0e6714 SHA-256: a5ba6cc2fafe01854c908fdd5cb530fd26773fdb97c9b2a4017120de6056e8a5
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF link points directly to executable/archive payload critical PDF_DIRECT_PAYLOAD_LINK
    PDF contains a clickable HTTP(S) URI whose path ends in an executable, script, shortcut, disk image, or archive extension. Documents can legitimately link to installers, so this is a high-risk delivery indicator rather than a standalone exploit fingerprint.
  • 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://cctraff.ru/aws?keyword=drive+me+insane.com In PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/120c0bf62c84.pdfIn PDF document text
    • https://kemumapuvepuvi.weebly.com/uploads/1/3/4/3/134311950/tetaparumub.pdfIn PDF document text
    • https://koxabiwepa.weebly.com/uploads/1/3/4/3/134309970/6a069d9a94.pdfIn PDF document text
    • https://xarupome.weebly.com/uploads/1/3/4/4/134469096/c8c8de1e64a86e2.pdfIn PDF document text
    • https://wepeweguwerixum.weebly.com/uploads/1/3/1/8/131856135/6e1b9bb02ac586.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007951.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007951.bin)
    • https://s3.amazonaws.com/jamokaroxoj/gakilazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70b0d85b-47b8-4999-ab9b-e8dd44618762/91417290858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e573e0d3-58ec-4237-808f-70a6d0aa5b5c/39039612276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42f8031c-b2b1-4049-9a21-aa269ed00686/dinogavotejuvuvaxezifuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f70b9e21-9fa8-4f2a-89f8-f04c2ce34c3b/ap_english_lit_essay_tips.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33752e99-8657-4849-802e-9d80e1bdfc72/87584215552.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/theological_lexicon_of_the_old_testament.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89d6e6ea-9cf2-4c35-9879-8bcdc5f494c3/putibinesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4121/0011/files/pure_bash_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4a1fd60-d44e-417d-82fa-636b870d5906/66396185780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86c3a634-3bcc-4228-ab2d-ff8446330d5f/xowibimokowe.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/30678652765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af11817c-d23b-4c12-8f60-496efe1fa101/11178780323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8555/2544/files/source_transformation_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b67976c-467f-4d5a-859f-f846eb8c34b3/jevimetori.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/barcelo_maya_palace_map.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/aluminium_6061-_t651_properties.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bfd1a20-754e-4f41-b856-ca845bb630b3/start_with_why_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a47f8921-7b12-46f8-b7de-112027ded71e/xekapalogola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0c33ae2-0160-4c06-9758-fd4e9d3d8546/nopopavuvogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2654/7366/files/78700994513.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 extracted file (font_00_sfnt_off00007951.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7951 5004 bytes
SHA-256: 6ba6d6dfe78ffa7f959b090a1a692a4e3101c429e62aea331100acbcd24681a1
font_01_sfnt_off00008a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A4C 10276 bytes
SHA-256: bd3da14ed020bb01cf4e94c2211a1caaea34b900ce65593d7bc15a984f6c3767