Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f7833b401d33cea…

MALICIOUS

PDF

42.2 KB Created: 2020-10-01 13:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b29599ebbed491d56aa1735922581122 SHA-1: ec3fe7795acd493c78090232242d123c196c0e92 SHA-256: 5f7833b401d33ceaddd92e8644dd8a98bbf96368fbbb778f1e3712689f59706c
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://gettraff.ru/strik?keyword=pdf+treatment+of+diabetes In PDF document text
    • http://files.windowartgallerykingston.com/uploads/1/3/2/7/132740214/luwekevute-munukenijekenum.pdfIn PDF document text
    • http://files.ryandavidbirdlarson.org/uploads/1/3/1/4/131407152/27585.pdfIn PDF document text
    • http://fokuj.yetiarts.org/uploads/1/3/0/7/130775403/wodosodoz-tevazowumajafa-leberik-wewilanoxib.pdfIn PDF document text
    • http://files.napfamily.com/uploads/1/3/0/7/130775950/5424081.pdfIn PDF document text
    • http://kobezuzox.killadooleyns.com/uploads/1/3/2/7/132712050/3f6047cb1a.pdfIn PDF document text
    • http://files.razfoto.com/uploads/1/3/0/9/130969884/bajogekajataro-bujururoj-bevuw-winepi.pdfIn PDF document text
    • http://files.gingerstache.com/uploads/1/3/0/7/130775775/rexarux.pdfIn PDF document text
    • http://dawikeki.ecautoelectric.com/uploads/1/3/0/7/130739142/55c64c5318da96d.pdfIn PDF document text
    • http://files.freeheartclinic.com/uploads/1/3/0/7/130775744/49298f83004c00.pdfIn PDF document text
    • http://kadekowaj.moonrisecomics.com/uploads/1/3/2/6/132682565/3385526.pdfIn PDF document text
    • https://site-1038890.mozfiles.com/files/1038890/pakirezofenavoxefubiloter.pdfIn PDF document text
    • https://site-1037850.mozfiles.com/files/1037850/savuzedirikegewajejuxa.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/1/0431/6823/5682/files/belly_dance_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9377/3467/files/vienna_grade_school_illinois.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/4011/2545/files/im_super_thanks_for_asking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2658/7549/files/zebaxipazuluxudidur.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_off000068d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D8 5160 bytes
SHA-256: b50ac72da9de3f361eb019d9e8ee2e54ba105d758335b03ec08f0467627f4474
font_01_sfnt_off00007a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A49 9788 bytes
SHA-256: 318a1733c284221f2625283616cbe3d86b91008b04d57f4377899b6d0bc32d9f

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