Malicious PDF — malware analysis report

Static analysis result for SHA-256 502d27c324015364…

MALICIOUS

PDF

55.8 KB Created: 2020-10-03 22:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 83ec595abe32d7927554f9c88573b432 SHA-1: e47f3c53092b587a225468c3a73a4e240ee86104 SHA-256: 502d27c324015364bf687d39e5454e78434027f18256c2579b7cbe7240409c07
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a link farm or spamming operation. The presence of a malicious redirector URL points towards a phishing or malware distribution attempt.

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/pify?keyword=linear+pair+definition+in+malayalam In PDF document text
    • http://files.andrewtaegel.com/uploads/1/3/1/0/131070771/2ed58934.pdfIn PDF document text
    • http://files.villaabadi.com/uploads/1/3/2/3/132303147/pemazulu-sijukazulus.pdfIn PDF document text
    • http://gogogumol.galleherlumber.com/uploads/1/3/1/8/131872155/3537812.pdfIn PDF document text
    • http://files.papamadeitwoodworking.com/uploads/1/3/0/7/130740536/ridelesamomipebised.pdfIn PDF document text
    • http://fokido.djchel.com/uploads/1/3/1/6/131606490/negosa.pdfIn PDF document text
    • http://files.prakashayoga.net/uploads/1/3/1/3/131384555/80231563215.pdfIn PDF document text
    • http://files.gavaresse.fr/uploads/1/3/1/6/131607075/61e1b2.pdfIn PDF document text
    • http://files.bergholtheathfc.co.uk/uploads/1/3/0/7/130738998/fumopo.pdfIn PDF document text
    • http://tukapive.mrhillsscience.com/uploads/1/3/1/4/131407406/893c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1695/1704/files/32869777198.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0729/3086/files/duck_hunting_guide_salary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6031/3768/files/momegubolilaxafom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1744/5791/files/41611615341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/jopojoliwasipogaripi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f88fd4ae-236d-4a09-81ff-e8ab031b10bf/terepimaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7db83bf2-0c7f-4214-a592-b525b635085c/3944686672.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5781 5052 bytes
SHA-256: 101ca965d349cbe231113aa7d04fc9bdeac45dd5f682241979739fd5a6f65b6d
font_01_sfnt_off000068a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A6 15844 bytes
SHA-256: b980efc7616acd6e694b77ca58f8363b0ed4022be3fb806b65ada89e7f2a1ad6
font_02_sfnt_off000099bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99BD 10240 bytes
SHA-256: 37c98a72ccf203b218871f03eee090335d6d1739f0d58769ce86a86bd3f9d993
font_03_sfnt_off0000bcf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCF7 16072 bytes
SHA-256: 24c5c481937acf4f4841e6563a6d7a18cfdb810806c94b09ac0ff4033348c1e6

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