Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e7fab80f66aa33d…

MALICIOUS

PDF

86.5 KB Created: 2021-04-06 18:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 104e15566d20fca4b7f5d4c3c689210f SHA-1: dca8d3f5e9fbc61b3a95bd97556da583666a99b0 SHA-256: 5e7fab80f66aa33d59a9df251de9b83a6b4f267aa968234b7e6cd46919452c19
204 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary URL pointing to 'maypoin.ru' which is flagged as a potential SEO redirector for phishing. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to manipulate search engine results or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://maypoin.ru/wix?keyword=monomial+notes+worksheet+answers PDF link annotation
    • http://jumpfs.space/general_ledger_template_for_numberswq0yf.pdfIn PDF document text
    • http://lajafago.medianewsonline.com/85956217899.pdfIn PDF document text
    • http://dabedera.mygamesonline.org/contoh_asosiatif.pdfIn PDF document text
    • https://xujokutiw.weebly.com/uploads/1/3/4/7/134749543/45d4c35a375.pdfIn PDF document text
    • https://pejifote.weebly.com/uploads/1/3/5/3/135348690/josegi.pdfIn PDF document text
    • http://jajuviramigawo.medianewsonline.com/rijovutemijosodosijovedun.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://xubebivox.weebly.com/uploads/1/3/5/3/135392957/bakaselita-gapefagegemeda-misoliz.pdfIn PDF document text
    • http://chempion.coffee/103438712627kelu.pdfIn PDF document text
    • http://lnstagramsecurity.net/why_isnt_my_dish_remote_volume_workingolha5.pdfIn PDF document text
    • http://kyukty68.xyz/9th_grade_poetry_lesson_plans104c2.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/is_134a_compatible_with_404a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://492f55f4-3442-4b37-b17e-39d9f2f0ae8a.filesusr.com/ugd/7dfe85_81f2070031374abbaee25838c8b28ba9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/tom_clancys_rainbow_six_siege_similar_games.pdfIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_9531561bbb96483c90efd74e341f05ef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/79997643300.pdfIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_3a62d4c4a09241b1a7e34474d1b867b5.pdf?index=trueIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_7a39b9f1b928400eac0ce402e26d99d4.pdf?index=trueIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_34edecf2fb92417fb8459e08d979a4a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/jedofu.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/doraemon_cartoon_episode_2019.pdfIn PDF document text
    • https://d128792e-e0a8-46e0-98ed-b941f5da69b2.filesusr.com/ugd/b98abb_b7214b91b67b470ea7f7eb093137b2e9.pdf?index=trueIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_5f6c53801b864361b1abeff71dcfd283.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/filidabut/angel_of_death_2_movie.pdfIn PDF document text
    • https://8ed6bd9f-de2b-4923-b7df-82f95eb18a03.filesusr.com/ugd/7fa32f_bdca5b4752ea4d49968195487a7a8a60.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD8 5088 bytes
SHA-256: bad50ef76e2c4f1f7f2d2980e5b99248670be7b9d1a8efe9ad6e4791ca8cfe57
font_01_sfnt_off00010e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0D 11820 bytes
SHA-256: f1e88ab1f56affd9365ee63046c272be3fe8ff185e37ae542ab925aefd975a1c
font_02_sfnt_off00013657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13657 16060 bytes
SHA-256: 713933360072c9d59346590fad668f98c3603c6d2b72ed941ce85481f6af0b74