Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5649125ceb66ff…

MALICIOUS

PDF

42.5 KB Created: 2020-10-04 13:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8d9863ba695ed7991c5a556f1b3bc8d8 SHA-1: a61c1e7cb0acfbb66a3f4d6de4225103a1c9176c SHA-256: 0e5649125ceb66fffdfef11890a389b2c8d0f75595f1ca8be06cd14671facb2d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The heuristic firings indicate the PDF is designed as a link farm and redirects to malicious infrastructure, likely to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/strik?keyword=balanceo+de+ecuaciones+metodo+algebraico+online In PDF document text
    • https://site-1036885.mozfiles.com/files/1036885/mimawurodetiwapagosedid.pdfIn PDF document text
    • https://site-1037018.mozfiles.com/files/1037018/gaviziwirebos.pdfIn PDF document text
    • https://site-1036926.mozfiles.com/files/1036926/40217404000.pdfIn PDF document text
    • https://site-1038792.mozfiles.com/files/1038792/bomadubiwuji.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/e045321a-2614-4cb5-96dc-841ed4c7124f/65428321816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a53bc8e-6230-4a98-b69f-a3982137aa56/lajonesirujoxarivanozox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7c5f51d-bab8-4bc8-a221-43267cb795e2/81922352422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/621e2bb0-a28f-4421-bce8-ab0ed9b5291a/vokagixomoluparesik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94a4891f-f481-4295-a612-1d8b52a92bb1/fapelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5255/1329/files/amazon_video_app_android_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7996/3302/files/black_sports_and_entertainment_hall_of_fame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6274/6517/files/woman_at_point_zero_full.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/5981909917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4692/0615/files/26326510683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8545/8325/files/what_is_the_overload_principle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7046/6464/files/eagle_court_of_honor_ceremony_ideas.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_off00006467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6467 5448 bytes
SHA-256: 567be52f9e433ae5988a47d250fea88c1610481eab862799a43793522cf17e7d
font_01_sfnt_off000076d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D1 11036 bytes
SHA-256: 50be3072637e7cfe718c969a2996e031fc4bd40475cd5bccdd566b900037b0ee

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