Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6a8992cf3b3cd3…

MALICIOUS

PDF

40.5 KB Created: 2020-10-02 07:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: fae6b346bc4066009825f58727385e29 SHA-1: db0581bf48c9599bee325ff9d10eddea80c8d5ef SHA-256: 7f6a8992cf3b3cd3930fb5c208bb67cc92437743e3608c31b578f0a304ce783c
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://ggtraff.ru/strik?keyword=no+module+named%2527+sklearn.+impute%2527 In PDF document text
    • https://site-1038739.mozfiles.com/files/1038739/tajesavakemogon.pdfIn PDF document text
    • https://site-1036689.mozfiles.com/files/1036689/bimopagakuk.pdfIn PDF document text
    • https://site-1036702.mozfiles.com/files/1036702/16029036686.pdfIn PDF document text
    • https://site-1036835.mozfiles.com/files/1036835/feledowedetur.pdfIn PDF document text
    • https://site-1039215.mozfiles.com/files/1039215/zepafevixizemimuso.pdfIn PDF document text
    • https://site-1038975.mozfiles.com/files/1038975/46061720952.pdfIn PDF document text
    • https://site-1039349.mozfiles.com/files/1039349/lusumanugetopuf.pdfIn PDF document text
    • https://site-1038517.mozfiles.com/files/1038517/dasitegatonoroko.pdfIn PDF document text
    • http://vitomob.dynoprotech.com/uploads/1/3/1/4/131437490/22374cdd10f491.pdfIn PDF document text
    • http://files.rdadivenet.com/uploads/1/3/1/4/131454109/c9294ce664c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9853/0201/files/christ_in_concrete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3583/6061/files/truck_bed_spare_tire_mount_f250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9650/1149/files/rug_doctor_instructions_cleaning_stairs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1139/8041/files/basketball_stars_2019_poki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6633/8711/files/tegafagegu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFF 5204 bytes
SHA-256: 1482a465d15d66eb465ada9fb672db8015fefc9003cb62602553925c98bd8b44
font_01_sfnt_off000070a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A5 10692 bytes
SHA-256: c91e5f787d763807637d802058519ce63cd71c88b6ea488823b8e65f907f14ff

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