Malicious PDF — malware analysis report

Static analysis result for SHA-256 562b2624a0ce5d3a…

MALICIOUS

PDF

51.3 KB Created: 2020-10-16 07:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 179acdca640d1579d73e7ad5d2da8f53 SHA-1: 7c11b293c7f13fed2e462c7dd47a706b1df624ea SHA-256: 562b2624a0ce5d3ac845e9d8047d921bd05679562b780697530d8cc42ac10107
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a link farm, and one critical link to a known malicious redirector. The presence of a 'download button' lure further supports a phishing or malicious download attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content, likely for further exploitation or malware delivery.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?keyword=game+nh%25E1%25BA%25ADp+vai+hay+cho+android+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5f8766013b218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368972/normal_5f88cee09c24d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f871f701cf10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369318/normal_5f88d846cb10c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f88bdb0ef52e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5f88bb3b881a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f87051811a02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_5f87091dad2f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f88c21437847.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/9b924f.pdfIn PDF document text
    • https://netulomite.weebly.com/uploads/1/3/2/8/132814473/lijov-peximil-rexagaberelef-mexesetagav.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/mikukinib.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/76c30d49.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a60d400-01ee-4760-b259-5947d90511ba/xodesamemimarenediv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b3bf333-bcc1-41cb-a45d-cf1999c3622d/86436043347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85b4adf0-9335-4ac8-bfa0-3c209fe1f769/8271846272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f817f040-d488-49e1-b574-377269cdc24d/nuwejoliva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6943/8652/files/fozawoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7650/0638/files/dc_legends_cheats_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0378/8959/files/router_guide_for_cutting_circles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7806/0698/files/the_girl_from_tomorrow_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8252/3834/files/bridesmaids_megan_gif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/79644393477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2549/0332/files/59586601207.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_off00008706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8706 5828 bytes
SHA-256: e592f9c5a9a15f67bfffb71cf49333bb3cdbd36e85e7e368a7644b850f3a6d16
font_01_sfnt_off00009a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A2E 10292 bytes
SHA-256: 56f3670bb942e1191805a70802567e590059f6c2a634ac98bac27e81f27f55d6