Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a9aa4e5f348bac9…

MALICIOUS

PDF

73.3 KB Created: 2020-11-29 05:16:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: dd24b5b21582aa1a0a8b856789cb680d SHA-1: dfc5a72f199b7a40a09527ee3b207ce9abf9aff9 SHA-256: 8a9aa4e5f348bac926dd39252ea7177888a50d824eeabffe33bece706e645fac
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/123?utm_term=23.2+the+second+new+deal+takes+hold PDF link annotation
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/5351011.pdfIn PDF document text
    • https://gukulijavezo.weebly.com/uploads/1/3/4/7/134714581/pudazigak-lalifadurum-dogenozosaxu-zarejedobutaj.pdfIn PDF document text
    • https://bugitepekasi.weebly.com/uploads/1/3/4/6/134669175/99d0b2e2c503ac.pdfIn PDF document text
    • https://fubomagasikeka.weebly.com/uploads/1/3/4/4/134474343/6c7a948f1f0ad2b.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/9444ce2cafd7.pdfIn PDF document text
    • https://tunuwowidu.weebly.com/uploads/1/3/4/6/134606858/4893205.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369514/normal_5fad9afcefb98.pdfIn PDF document text
    • https://juladuwupib.weebly.com/uploads/1/3/4/7/134763366/185831.pdfIn PDF document text
    • https://xowilululevala.weebly.com/uploads/1/3/4/0/134017879/5667762.pdfIn PDF document text
    • https://jafazoragi.weebly.com/uploads/1/3/4/7/134769717/bezimajoxedaxuz-vexizugikoj.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/wuferotuliguxag.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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://uploads.strikinglycdn.com/files/7c206daf-830d-468c-ba3c-4f9c83b470cf/12329346706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a39fac56-7108-4d2a-b339-f279c4a33bed/70857273795.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/rejovu.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/bhimavaram_bullodu_full_movie.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC98C 1728 bytes
SHA-256: ea5f39a4ceba791772aa2f4814517dd5722aeea733a01686da649f7090e18245
font_01_sfnt_off0000d1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A8 5060 bytes
SHA-256: 1c79f0437fd74e4dbfaf7ce65760227d7757e5e5d56da5d76816517fe22edf06
font_02_sfnt_off0000e2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D4 11452 bytes
SHA-256: 2f298f933586ec23a3a23ceac94236c7533ed65d2154c42564e6061d7af18d6d
font_03_sfnt_off000109dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DD 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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