Malicious PDF — malware analysis report

Static analysis result for SHA-256 708088df964f20d5…

MALICIOUS

PDF

45.7 KB Created: 2020-11-08 01:36:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 7a5bc84dfb7c2aec7e165900547918ce SHA-1: 237f8efc3bc2cbe7a744ed0c2e879014f7162968 SHA-256: 708088df964f20d55e0e236e9b988a7699b21575bb824bbe2258ff00ba6a97ab
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://traffking.ru/aws?keyword=my+singing+monsters+hack+tool+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f88c9d7c59d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374366/normal_5f9a0ea5eaaa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5f8b70b55379d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dagirivemaj.files.wordpress.com/2020/11/arsenal_roblox_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/soopa_villainz_hit_list_download.pdfIn PDF document text
    • https://sazajade.files.wordpress.com/2020/11/fefofapexadomak.pdfIn PDF document text
    • https://bugowapowufe.files.wordpress.com/2020/11/14358416090.pdfIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/lugotorizereziwatogukomak.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/zuripan.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/jobepokuluxesodugukuvavar.pdfIn PDF document text
    • https://tevarew.files.wordpress.com/2020/11/88608638079.pdfIn PDF document text
    • https://lamojofof.files.wordpress.com/2020/11/me_divierto_y_aprendo_1_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/automates_programmables_industriels_2e_dition.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0B 5516 bytes
SHA-256: 9cf7666c3ce840a75887d2d26f7389839edd27eafe64814cea1b9282d084d24e
font_01_sfnt_off000071be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71BE 10348 bytes
SHA-256: 971ebb3db1968c3d578a12d3e1c57208affd94b39ca5ed718fdbf33e182f2df4
font_02_sfnt_off000094d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94D6 16092 bytes
SHA-256: 2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140