Malicious PDF — malware analysis report

Static analysis result for SHA-256 c781f226c6ce95ef…

MALICIOUS

PDF

42.6 KB Created: 2020-08-18 15:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 01e45fe454e021a6d726184c4ecfd75a SHA-1: 31900820e7662965de34ef706d03e76010bc9217 SHA-256: c781f226c6ce95ef3fbe1df60b091d7101c0b0b9eaf1ba2150163e64e3c23567
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://ttraff.cc/pify?keyword=oracle+ilearning+section+6+quiz+answers In PDF document text
    • http://gajako.mobilebeatzofcolorado.com/uploads/1/3/1/6/131607600/9755560.pdfIn PDF document text
    • http://mezokog.pawsforacauseinvitational.com/uploads/1/3/1/4/131437679/b010612383.pdfIn PDF document text
    • http://womebogu.buypolarxtracts.com/uploads/1/3/0/8/130813765/luzetopafogu.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/1/0432/6404/9318/files/malofivigupokadorozefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5111/3887/files/lefadadasivomavexiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/sojuvogop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/kuletewexoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/lufeguwipemoxuxeku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8135/8759/files/79405803038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/free_broadway_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8424/3363/files/punctuation_exercises_for_grade_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/3257/1044/files/inverse_discrete_wavelet_transform_equation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7927/7467/files/pathfinder_kingmaker_paladin.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_off000066fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66FA 5416 bytes
SHA-256: 87b80ed62d940a435960e1bba1938b7710eeb86fd08f2427f6fe9c336ae9b2d0
font_01_sfnt_off0000798c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x798C 10020 bytes
SHA-256: 54d8d9df5828c09d505cbe6d5262433e8ac7d0059401e765a69812fc9b3173bd

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