Malicious PDF — malware analysis report

Static analysis result for SHA-256 27fea5e7e3fd1925…

MALICIOUS

PDF

46.9 KB Created: 2020-10-28 21:17:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: d74ced5a33e8b8fc2da9f3e976fb956e SHA-1: 7a42399838965f1e5e61cf993776809a759ac4c6 SHA-256: 27fea5e7e3fd1925c5ed1338d46d831d5aa64b28d06fb5348f2525e695ef2566
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/pify?keyword=peter+brook+the+empty+space+quotes In PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/5c3862a640e9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372383/normal_5f8fc78c65700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376375/normal_5f8f75bf8646e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378830/normal_5f8c78d9cc106.pdfIn PDF document text
    • https://lofivate.weebly.com/uploads/1/3/4/3/134307733/6965328.pdfIn PDF document text
    • https://tinijaxiri.weebly.com/uploads/1/3/4/4/134440903/womofaxif-nilumexen-nomeluzapa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408866/normal_5f949575d9868.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375083/normal_5f8ef2fad7677.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006a9e.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006a9e.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00009f97.bin)
    • https://cdn.shopify.com/s/files/1/0491/9135/4534/files/anatomia_cuerpo_calloso.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/79633557667.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/zolokadigid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8081/8581/files/tupilejifegifaposas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5284/1152/files/2377453236.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/defojisuxobisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7156/7559/files/audit_ohsas_18001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9557/3158/files/rovigijofa.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/seer_anointing_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5008/1690/files/login_with_facebook_in_android_studio_github.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3540/1633/files/adjectives_that_start_with_e_to_describe_a_person_with_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4276/5976/files/daxopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7198/8410/files/gojar.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/economy_toeic.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/jodomutebepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0623/2229/files/82808397302.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 extracted file (font_00_sfnt_off00006a9e.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9E 5304 bytes
SHA-256: ccf7e9ca1f959c60be658ed10cedf7d4b9ab114b1e6dcdd58ccb62d7ba3f9e20
font_01_sfnt_off00007ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA7 10216 bytes
SHA-256: aad6a23ad061c23043bc74bd3b67839c189d835bda59e0efa5eba447e1b68638
font_02_sfnt_off00009f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F97 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176