Malicious PDF — malware analysis report

Static analysis result for SHA-256 203f7d245e070d28…

MALICIOUS

PDF

60.2 KB Created: 2020-10-16 22:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 24d732b6c2faae73fb53c83ad917183f SHA-1: 5ab8e647fe4123d9e3eb3871c1f00356d00349b1 SHA-256: 203f7d245e070d28cb924a92e5d9675f380d2e57b6c5c7353d52914ea2805005
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://gettraff.ru/123?keyword=credit+card+number+generator+apk In PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/kuwekewugi.pdfIn PDF document text
    • https://nozagovedenide.weebly.com/uploads/1/3/2/6/132682533/runam-putukibe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f87414650fd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f8778671c0d1.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/tadib-pepalitegugoj.pdfIn PDF document text
    • https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/pemar_dugoregulaxal_wixovomidinor_lepiruxo.pdfIn PDF document text
    • https://zoxetojasag.weebly.com/uploads/1/3/1/4/131437223/5753031.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/1/0502/5654/3944/files/71008047542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3241/4874/files/nunir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9041/4241/files/skam_free_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1851/8179/files/10699663166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6313/9733/files/semijovevub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1959/9511/files/pick_up_your_phone_ringtone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1740/3549/files/pafoxilar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4530/6011/files/sky_sports_premier_league_channel_tv_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9038/5823/files/55264105440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9675/0746/files/android_studio_arm_emulator_slow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4965/9801/files/xuwuxigaxejebidamubami.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_off0000a492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA492 5292 bytes
SHA-256: 5ca763aab824e34689693f3df2938cdca6dfaffac81a0c7d0f864d38f9d40396
font_01_sfnt_off0000b675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB675 14320 bytes
SHA-256: 6bc797e55a6ef8b7556dd174495b2e50c20252d1f5ee924c2eafb2906d26991a

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