Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7cb4a978fdac2bd…

MALICIOUS

PDF

45.7 KB Created: 2020-10-18 18:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 29d93bb79f6abb8387803df41c8a87e8 SHA-1: efaa8d3be6b423c35733b824c7b54de9b31eeb68 SHA-256: f7cb4a978fdac2bd701cacbc59da21a069c620bee47678080e400a4a824fdb74
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/strik?keyword=marching+band+sheet+music+pdf In PDF document text
    • https://fezuxikazosulav.weebly.com/uploads/1/3/1/3/131398093/gizitixumuf.pdfIn PDF document text
    • https://xexovelez.weebly.com/uploads/1/3/0/8/130813416/gofifajasu-davitu.pdfIn PDF document text
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/fovinulemutufejelawi.pdfIn PDF document text
    • https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/9337139.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/36ce75ac.pdfIn PDF document text
    • https://gexirirexov.weebly.com/uploads/1/3/0/8/130874239/2304338.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/dazaton.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/vakuk.pdfIn PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/b5ad81.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/1/0482/8440/1819/files/cuisinart_em-100_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3556/4949/files/48068060864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2715/9448/files/retractable_baby_gate_target.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5417/7185/files/plyometric_box_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bd52cda-5f19-4275-bb5f-91521ce6bd94/55425668411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d43ae1b-c1d1-492e-aa75-913254e64dad/12097051843.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71145cf8-e1f4-417b-8d28-8acc8bf3ef91/4457019313.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e189d56e-fb8c-4998-8bac-08f90687fb98/61263921829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a52dbf7-f231-4bfd-afe0-2beb337b5476/rofepomatedonigogapono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6074/3329/files/lezufejiwafovefajurimape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2785/5517/files/43119105380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0669/7887/files/84371555801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4106/3590/files/700r4_rebuild_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4415/4791/files/rolusamew.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_off000071d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D6 5680 bytes
SHA-256: 52509f987124bfc82eb42623f19bb25ea90c032df636f0f97aeb6d5c04936ca4
font_01_sfnt_off00008501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8501 10664 bytes
SHA-256: 5c16bb54aadd3b27195d1bc08e1bc3969f2f5bd85a9a6f286599249111f07f07

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