Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a48495d6e880044…

MALICIOUS

PDF

71.1 KB Created: 2020-10-26 16:18:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 52c0229cdb898749ed372473b3429185 SHA-1: b72dd1d16968fe7cb749628f3d418a0892e7111f SHA-256: 3a48495d6e880044f658ce7e7733124a91926ee4b49ec34102be2403b667778f
194 Risk Score

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.
  • 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.
  • 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=peter+drucker+pdf+books In PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/1d1f8ecc085ca.pdfIn PDF document text
    • https://genamimiwovem.weebly.com/uploads/1/3/1/6/131636881/7372487.pdfIn PDF document text
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/nenuw.pdfIn PDF document text
    • https://ligexomapaku.weebly.com/uploads/1/3/4/3/134321337/7338fa7d7103.pdfIn PDF document text
    • https://sevivuninuk.weebly.com/uploads/1/3/4/4/134459749/f41a8b9c28e65.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/67dfa75a.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/446bc0a36280.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/6763278.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/ed707739ce643b.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/546312.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000b427.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000b427.bin)
    • https://cdn.shopify.com/s/files/1/0430/7274/9721/files/speedometer_app_for_android_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3370/1781/files/missouri_judges_ratings.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5251/4979/files/yes_chess_song.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/candy_ke_word.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/vikumofabotugelub.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/37511690929.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/8_bit_ascii_table.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/sensory_evaluation_practices_stone.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/3750495792.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/tuwopibojiba.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://dejavu.sourceforge.netIn extracted file (stream_006_off0000e9ce.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (stream_006_off0000e9ce.bin)
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off0000b427.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000e9ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE9CE 22056 bytes
SHA-256: 9ca756ff479fd96e99e8a57202a24d4472737c3ca14019dc3b893be11c3243d7
font_00_sfnt_off0000b427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB427 5112 bytes
SHA-256: a5757f5fcf38bc26c5264cd1d0441a7322d34693925933b35e8c33ba2d8229b6
font_01_sfnt_off0000c594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC594 10556 bytes
SHA-256: b084f149ea3873aeb1fa09b0cd702a51d3f1350411959c5a89cd8e29331f8f9e