Malicious PDF — malware analysis report

Static analysis result for SHA-256 221bd1312e5492ea…

MALICIOUS

PDF

56.6 KB Created: 2020-10-17 01:23:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 69d90b7625e117ca63468af1bdfe0ac7 SHA-1: e7734790720967558fb1084b9fe8feb575341407 SHA-256: 221bd1312e5492eafb5088bc51bc66a74726a1b647816c40181b0ecbb1ddfba2
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.me/123?keyword=zenonia+5+hack+apk+unroot In PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/1048767.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/296005e7bc61fc.pdfIn PDF document text
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/kugoxikukone.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/dolopitubolagu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374022/normal_5f8a1718ca0ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f87760920055.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374956/normal_5f8a1418b1d51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f8744f801c19.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/1/0499/1477/3672/files/29278199276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1223/5159/files/dominant_and_recessive_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/859b2ce9-59b2-414f-949d-19baffb95c1f/54262407382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e2756ba-8b7d-4014-8431-cd419aaff6ac/fusijab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/942b755a-7b55-4f47-81e9-dcf3e4ac27f6/95559453298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2939/8182/files/nirefoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9947/8434/files/79809413412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7971/9317/files/dragonvale_hack_android_no_verification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3074/0135/files/zamebifolivak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4579/7026/files/dd_3.5_damage_threshold.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1B 3308 bytes
SHA-256: 40fd88c43db184d0182981f7c6a3ce9d39b848fc1f52397a260b56f5172fffcd
font_01_sfnt_off000086eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86EB 4956 bytes
SHA-256: 1c87ffbf9fb71373198703771f72139b8593dc481c0842186918d0a463d1242a
font_02_sfnt_off000097c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97C2 11112 bytes
SHA-256: 098e35906067c206c548c2f5b030f0751bf2aac9de7fd6ed237f273d10889a80
font_03_sfnt_off0000bd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD6A 16212 bytes
SHA-256: 0cff798dbb869ecf6569faf3360e2ba8613492e199b654a29940e323b214de87

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