Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7171c7ddc572126…

MALICIOUS

PDF

43.5 KB Created: 2020-10-28 16:12:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fe44e056e5b49fb5ca47ed5ad13ab294 SHA-1: 666ee187995b16381122e4c7edb801f78992155d SHA-256: f7171c7ddc5721266f65dd001d23691171fceaa39977ca64ca4d15b9a94c572c
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/aws?keyword=lay+clergy+difference In PDF document text
    • https://bakuwosir.weebly.com/uploads/1/3/0/8/130874569/e11b9c9a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383698/normal_5f99484e1d172.pdfIn PDF document text
    • https://beperiguvo.weebly.com/uploads/1/3/4/3/134320750/vagotemizoxavetipa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376382/normal_5f92588dbf40a.pdfIn PDF document text
    • https://votawaxamudogop.weebly.com/uploads/1/3/4/4/134400347/lejizidawin_wopapewo_jujupepu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379839/normal_5f8aefb48ba1a.pdfIn PDF document text
    • https://pagofere.weebly.com/uploads/1/3/1/3/131398194/978492.pdfIn PDF document text
    • https://malalufapavi.weebly.com/uploads/1/3/4/4/134481779/xudovevegizud_wafopalowof.pdfIn PDF document text
    • https://jidugurulepapol.weebly.com/uploads/1/3/4/3/134310086/03b0b1e7a.pdfIn PDF document text
    • https://tiferivirukituk.weebly.com/uploads/1/3/4/4/134433041/masez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374857/normal_5f92600d17951.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/beneruvilogapox.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/1/0432/7204/4697/files/android_oem_unlock_adb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0957/1990/files/interrogative_sentences_in_english_grammar.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/522055965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9392/7081/files/editor_de_video_para_youtube_pro_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/3685/2391/files/loudon_elementary_school_fax_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6898/3969/files/54457141130.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/68978676494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6044/5855/files/mirerulonejatuvemurizex.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/24_7_capitalismo_tardio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0279/4992/4543/files/43264598812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7656/0059/files/42939620778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3335/3118/files/organizational_theory_design_and_change_pearson.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_off00006dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFA 5056 bytes
SHA-256: cd5ca9ab69c84a8aa8af3906c275ccf72f1c094e17dad707e0c829005b92d14c
font_01_sfnt_off00007f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F49 9624 bytes
SHA-256: a8acb7bc1792173271bd22ca04e930618216a9bbbb9ab9d911c9c850266351ba