Malicious PDF — malware analysis report

Static analysis result for SHA-256 e705ede9f4218381…

MALICIOUS

PDF

67.7 KB Created: 2021-01-09 16:46:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 7242c4d0e8a39750373a43a47e721b4a SHA-1: eceba2f00568c6d9a4ca65e55ac64963b4907731 SHA-256: e705ede9f42183815040952110b2de8682d7b665d9adf413c2f9478a9a3e973c
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document acts as a link farm, directing users to numerous external websites, one of which is identified as malicious redirector infrastructure. The document's content is minimal and appears to be a lure, possibly related to disaster recovery, to encourage clicks on the embedded links. No scripts were extracted, but the presence of numerous links to potentially disposable hosting services and a malicious redirector suggests a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/aws?utm_term=disaster+recovery+testing+report+template In PDF document text
    • https://kovelikazaw.weebly.com/uploads/1/3/4/7/134705675/zajujuxixuzis.pdfIn PDF document text
    • https://letitunonagafi.weebly.com/uploads/1/3/4/4/134494227/danuga.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/cjcJYER/guvadugovevugibuvo.pdfIn PDF document text
    • https://xifofenanupov.weebly.com/uploads/1/3/4/8/134857182/vimanilikotuvopuvu.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/GLi1jeu/movitukojikup.pdfIn PDF document text
    • https://jupoxoguji.weebly.com/uploads/1/3/4/0/134097256/wumadamakix_lokonerod_moxow_kefebuzibuziwi.pdfIn PDF document text
    • https://gotanizanoga.weebly.com/uploads/1/3/5/3/135332446/zusixakobu_zerukebov_bonupiruvubupo_tezebabote.pdfIn PDF document text
    • https://jibuzuku.weebly.com/uploads/1/3/0/7/130739289/8693518.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454694/normal_5fddab981255a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5fbd1e8fa6c2f.pdfIn PDF document text
    • https://xeligedijeka.weebly.com/uploads/1/3/1/0/131070237/goxaba_wivotadowi_tuzewelenil.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/julexekubaj/apa_annotated_bibliography_template_google_docs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e5a22ae-81e3-4367-8f0a-423c793fb4f2/pocket_mortys_crafting_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a48f5bc6-0ab7-4cd4-b963-97dc1f7a1cf8/xanthelasma_argile_verte.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_off0000cbd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD3 5416 bytes
SHA-256: 6f82eed0cd23b89e69f898aae5ec32ad6fdc595d2c17c7c341b95aef9ef910ef
font_01_sfnt_off0000de46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE46 10344 bytes
SHA-256: bbc4183294593f50dbfe1027493c8d1e9f9165a21f6b49f9c8fd59e3597555e3

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