Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fb1d5d010ed42af…

MALICIOUS

PDF

46.6 KB Created: 2020-09-15 07:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: cf979bcd95376722a4f8320a964c292a SHA-1: 2cda2db1a533e7fbb2e354d859ff4861c3c6e648 SHA-256: 5fb1d5d010ed42afe4e23c11d8b1c3ddf7c07d750b40efe8fcde321ea99f958c
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.com/pify?keyword=vesting+equity+contract+template In PDF document text
    • http://files.berenikakolomycka.pl/uploads/1/3/1/3/131381607/20587074.pdfIn PDF document text
    • http://files.scottsackettla.com/uploads/1/3/0/8/130874422/terusif.pdfIn PDF document text
    • http://files.dsdominion.org/uploads/1/3/1/6/131606222/kiginola-ziroguwamovo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3899/7669/files/mivexosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/4625/3222/files/java_book_filetype.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97253363073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8941/2764/files/national_achievement_test_reviewer_for_4th_year.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3414/7989/files/ccleaner_android_pro_apk.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4cfbbd_5f1d71efddbc47db9316e0e4fd5b7917.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b7306e_c602e3f41e3e4463aa62fdeea81b7c64.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a2e20a_2751aa9cbbe64226af018de61ac2d062.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bc79a4_7167006a78884acf9596b5d4243dce9d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/930050_39cf21eb88b84183982aefd290eef20a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0ad6c7_b64b42ff34b04a61a9e3afe9f41f78db.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fd30ac_f91ef28cc98449a583a7898e0fa7cd4f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e3325f_d5cb52f41b33493c928e4580b486a217.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/466fa0_de694442c9f843b2a625f8e814b10440.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6202 5328 bytes
SHA-256: 68a5be1de8106843c1b5779eea75d9cdc14e65e6fe53cd44feb0b162611ac39f
font_01_sfnt_off00007404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7404 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00007c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C91 10016 bytes
SHA-256: 1e10b59b9137c1d24f0e85a8c5259f7c8300210e7e30293046055166b0abaf73
font_03_sfnt_off00009ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ED4 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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