Malicious PDF — malware analysis report

Static analysis result for SHA-256 213de15ca52ffcec…

MALICIOUS

PDF

62.8 KB Created: 2020-07-28 16:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f80a1752b627e12be571abaca4212c85 SHA-1: 03d1beb3ec6e0d9466fb8be73d62f6284e0c992d SHA-256: 213de15ca52ffcec77c7b12301c46daf18ac9d54c2e77cadbab233dde71db20b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also flagged the document as malicious. The primary attack pattern appears to be SEO spam or phishing, leveraging link farms to direct users to potentially harmful sites.

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://ttraff.com/pify?keyword=barbie+makeup+game+apkpure In PDF document text
    • http://files.makewonder.blog/uploads/1/3/1/4/131437765/7109150.pdfIn PDF document text
    • http://files.wicklow.coralleisure.ie/uploads/1/3/0/8/130874541/7906750.pdfIn PDF document text
    • http://files.marismakeovers.com/uploads/1/3/1/8/131856234/5429250.pdfIn PDF document text
    • http://files.kristamaysart.com/uploads/1/3/1/0/131070485/xaxevijuvumoben_vevagisupa_zolugikunuwak.pdfIn PDF document text
    • http://files.poseidonsporthorses.com/uploads/1/3/0/7/130740442/zezufinifemizaw.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/1/0437/5294/7873/files/kisexusuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3248/6823/files/jovopigorugasozili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0798/1214/files/tufuxogoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/wemaja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voxetevew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5738/1530/files/38401230777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwunojipodaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8666/7158/files/tivel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0904/7717/files/lajelimojanetorifis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6640/0663/files/42154972202.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4477/2757/files/42080368207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9059/8305/files/64822648671.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1532/3291/files/gavowekemijajikasubufir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2642/3708/files/leliwa.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6919 6440 bytes
SHA-256: a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c
font_01_sfnt_off0000790d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x790D 4768 bytes
SHA-256: 222c4af0c31bc8b6812c5b966d3b290638a85ff2e6e39a4e9fe3fa85a69d0f80
font_02_sfnt_off00008939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8939 13588 bytes
SHA-256: 02add3e6a853bf284870d9db3169071b5031ef46e92758a064ee5f6490a23e3e
font_03_sfnt_off0000afa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFA5 11004 bytes
SHA-256: 757e8c7b8988fd1e371fdfca14d95bd953a317fb6e3da1bb3c884acbed564dbb
font_04_sfnt_off0000d500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD500 16432 bytes
SHA-256: c7a0490ceafc5196eba2d09aef36f0460f472957ab8da0ff8544d2fdb67ac059

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