Malicious PDF — malware analysis report

Static analysis result for SHA-256 155d5800fc8aceb0…

MALICIOUS

PDF

47.1 KB Created: 2020-11-09 11:02:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 211e4fb0f72cfe1a9a49dd9761708666 SHA-1: 3ab68a2cfa22f281e7f49a30df9445a7dfdc5d31 SHA-256: 155d5800fc8aceb0323b143e14fe57950d4bdca5a3ce0773c6704117395cd436
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffset.ru/aws?keyword=love+island+mod+apk+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369511/normal_5f8af6d146c02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448542/normal_5fa7e0a8763b4.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/rijavo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389601/normal_5f8efba32c907.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374859/normal_5f918d4046c41.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/tonemakopinibem/giraffe_food_web_chain.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/elektron_analog_four_mkii_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/46632836771.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/18557383959.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/mowana_song_list.pdfIn PDF document text
    • https://zetitomaguzo.files.wordpress.com/2020/11/gartner_magic_quadrant_endpoint_protection_2020.pdfIn PDF document text
    • https://xelinatuki.files.wordpress.com/2020/11/12873235441.pdfIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/68091325827.pdfIn PDF document text
    • https://mutozofe.files.wordpress.com/2020/11/67728004733.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_off00007876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7876 5164 bytes
SHA-256: 00fb967b86086219983eae29259ba7fb96a2ce1d6488f2b2239bfade7e20ddf4
font_01_sfnt_off00008a12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A12 10968 bytes
SHA-256: ecae679a998b531c39bf62058b0b7136862eb282cb428daae2d0a28c98738de0