Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be47e22296fa56e…

MALICIOUS

PDF

42.5 KB Created: 2020-10-22 10:51:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: be1af19e0eb630bcc6f3b56d1b3bd085 SHA-1: 3100273e5175495d27b61791f2f5fd707e92c893 SHA-256: 8be47e22296fa56ec9a0fc13433d2df423af5533a93b7a0623d65daea703322b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to link farms and a known malicious redirector. The document body, though partially garbled, suggests a lure related to a form example. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL confirms the intent to lead users to harmful content.

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://ggtraff.ru/strik?keyword=aday+%25C3%25B6%25C4%259Fretmen+4+a+formu+doldurulmu%25C5%259F+%25C3%25B6rne%25C4%259Fi In PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/wovexotepevop_xodol.pdfIn PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/jewanomisajigozijiru.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/gapovowumepekegosiza.pdfIn PDF document text
    • https://gujodoludota.weebly.com/uploads/1/3/2/6/132681740/2a4b1e53520.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/255749d778c8.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/d04152a7-31c1-4341-a94e-2c0cd04e2cc4/povibixowuporu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adcbd268-f1ed-4a43-afa8-8caa58f11a2a/ranefirazafibozi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83e223a0-b5eb-4ef3-a47c-775e0df98cd6/55266041721.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5429/1354/files/70307152959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3942/2624/files/luwadolel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9228/4070/files/pexofodagomema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0660/6498/files/cunto_equivale_168_libras_a_kilos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/8828/8413/files/14496101530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9881/4649/files/cheek_cell_lab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5336/2599/files/northern_tier_route_planning_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2199/2599/files/51140985405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09180537-8da0-41b5-a446-b0f554e820ee/79942399454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98e04909-3d76-4ee6-bae7-87f43982f1f4/pelipowidodib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1214/7365/files/what_is_an_owl_pellet_dissection.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/como_rootear_mi_android_con_kingo_root.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0354/3715/files/nivutexenevira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/5281/7573/files/advanced_custom_fields_documentation.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_off000063ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EF 5668 bytes
SHA-256: 1121aee002fdce7899086ec11d0141415a7f00887a5b6656f4f1c5a1fe605326
font_01_sfnt_off000076fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76FC 11104 bytes
SHA-256: c9f8de35fdf080ea88504840c378926b63564076b283bcf9289d64234d6ea881

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