Malicious PDF — malware analysis report

Static analysis result for SHA-256 374ec88c0be614e7…

MALICIOUS

PDF

47.9 KB Created: 2020-10-29 03:54:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 60c40039eb7fb6cc02c56f366b4c3cf0 SHA-1: edb6a93e15680de47ebb492c186d3aba191b0ca2 SHA-256: 374ec88c0be614e77b48d6fd7d91b617eb6c4e4984822c110210867d91fa0de5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The primary purpose appears to be to lure users into clicking these links, which likely leads to a malicious website or malware download. The ML classifier strongly supports the malicious nature of this PDF.

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://cctraff.ru/strik?keyword=wunderdog+nfl+consensus+picks In PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/8051375.pdfIn PDF document text
    • https://gadigode.weebly.com/uploads/1/3/2/6/132680949/lidol-powirivisazibe-parotik-rasivupa.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/c0fcd04.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/6071975.pdfIn PDF document text
    • https://kotonimurapuva.weebly.com/uploads/1/3/4/4/134440920/kazozotixigata.pdfIn PDF document text
    • https://libizewixowu.weebly.com/uploads/1/3/4/4/134432873/341255902c772c.pdfIn PDF document text
    • https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/nepaxax.pdfIn PDF document text
    • https://bipixexomalexu.weebly.com/uploads/1/3/4/3/134349320/dumuwenikodixa-nodojor.pdfIn PDF document text
    • https://nulakumoxuguv.weebly.com/uploads/1/3/1/8/131871970/kavogev.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/1/0266/8619/3844/files/jonivisiputakanikelaluxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8848/7602/files/44559978384.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/fowirafasunajeselamim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9605/5202/files/download_canoscan_lide_100_on-screen_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4828/7904/files/44894866835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4952/8727/files/how_to_describe_tone_in_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7697/4747/files/gummy_bear_demon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3689/3599/files/anatomy_of_a_wasp_nest.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6645/8266/files/42341548977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9879/0301/files/tulizevof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/7756/5337/files/conair_hand_steamer_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9725/8136/files/49209598362.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_off000072ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72FF 5188 bytes
SHA-256: b8781f12e5ad4342be04e7ca765c99ac736462cc1eba0ae00f18b01343a75037
font_01_sfnt_off000084d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D3 14844 bytes
SHA-256: 8d8352b343d2514845ff1d61e71c0bab71138ff136b99af71f23ac2783ec4d3a

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