Malicious PDF — malware analysis report

Static analysis result for SHA-256 241d7b9d710bc440…

MALICIOUS

PDF

43.2 KB Created: 2020-10-28 12:11:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: b99ce894a267798603df0f823d7b6f8f SHA-1: 1bb035c1df8936ba563b7557a4b29708d7e602bf SHA-256: 241d7b9d710bc4408129e683234d79989736d0ff3cd9943c5803805eedf0072c
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/aws?keyword=unblocked+games+wtf In PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/kupoxenegavo_rowefipimesoge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5f9078d11072e.pdfIn PDF document text
    • https://dunidapakepew.weebly.com/uploads/1/3/4/3/134319263/3205277.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375886/normal_5f899cca62df4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f87ca2658a9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f8de2c52de8d.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/4802602.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/811c5bce137c.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005ccf.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005ccf.bin)
    • https://s3.amazonaws.com/zoromexemuzid/carrier_ductable_ac_error_code_list.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/palafuvaxirojuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68ae36c6-bdeb-4606-9f51-4fdcbd0140b8/misli._com_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77b65710-dd6c-4fad-882e-c1339ea511e6/tegube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8221/4301/files/ottogi_cheese_ramen_english_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/fagudopabozelib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7040/0928/files/folktales_from_around_the_world.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/jajupomavupagujitatawekat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9902055e-284a-41e1-8e1e-6416151369fb/sakemarebenigeg.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/secured_to_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40c6a212-91b5-4f00-beb9-727002c307df/jareselabutidedozozusomev.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_off00005ccf.bin)
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn extracted file (font_01_sfnt_off00006fa9.bin)
    • http://www.gnu.org/copyleft/gpl.htmRegularIn extracted file (font_01_sfnt_off00006fa9.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCF 5532 bytes
SHA-256: a0ac0fad725f278c88ff796f74f4712896a3a9e81ebf17360c63b3d008e0ca47
font_01_sfnt_off00006fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA9 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off00007b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B0D 10608 bytes
SHA-256: a05002a952ae690329b7207d22e0788eef1a9ca8200603ae7f2a317821759440