Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7612fa7538e129…

MALICIOUS

PDF

67.1 KB Created: 2020-10-29 15:36:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 2c953504ab0a3bdd3a5eafa9ade69c7d SHA-1: a86c95282133e6a391765406c2386d60ace7388c SHA-256: cd7612fa7538e1297bbf30aaa2eefc836f894cd0213518df1146f1ad05eac106
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=patrimonio+cultural+y+natural+del+estado+de+mexico In PDF document text
    • https://delutezebojuk.weebly.com/uploads/1/3/4/3/134353455/ba8658f2f109c.pdfIn PDF document text
    • https://pawuxadatunu.weebly.com/uploads/1/3/4/2/134266652/juwor.pdfIn PDF document text
    • https://xexofomes.weebly.com/uploads/1/3/4/4/134489610/wugapi.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000c3fa.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000c3fa.bin)
    • https://cdn.shopify.com/s/files/1/0500/0160/8854/files/guitar_tuner_android_2.3.6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f94dee79-3690-460f-a739-6a828bd7f79d/28412732955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0722/0644/files/riddle_school_1_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6041/1547/files/love_story_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5265/2951/files/ximejetosagutanunaxatuda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f9cb0ca-57fe-4a42-b119-e91d3e998bed/martin_lings_muhammad.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/gallbladder_anatomy.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/body_language_in_sinhala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5817/4396/files/widaseruvabis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0490/4350/5329/files/vampire_bloodlines_best_mods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4063/5042/files/swords_and_sandals_2_hacked_unblocked_weebly.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9779/8829/files/tabla_periodica_hd.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_off0000c3fa.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3FA 5256 bytes
SHA-256: b2a5e9b32f6e55d5108324f5b1d5530103bcdfc5813f778c4a91f15c68acaa65
font_01_sfnt_off0000d5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CB 12200 bytes
SHA-256: 2643da97d36e25d876384e39fce635403e1f14328e7dd487a43aa6cf530d2f8f

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