Malicious PDF — malware analysis report

Static analysis result for SHA-256 59bbebf8018b9ad4…

MALICIOUS

PDF

44.0 KB Created: 2020-08-24 14:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5c8161f5f43d47b3978ff283afcc9856 SHA-1: 381269c2592a2701718501efa947f001ee417b5c SHA-256: 59bbebf8018b9ad42ce53d67cd5a2f16326d750f658a807f00fde4f35f783568
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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.ru/pify?keyword=hold+mail+post+office+form In PDF document text
    • http://files.mysecondhandrose.com/uploads/1/3/1/4/131409597/kumurojixosakosuf.pdfIn PDF document text
    • http://files.tastefulvoyages.com/uploads/1/3/0/7/130775506/putijegijekur.pdfIn PDF document text
    • http://files.anggonolab.org/uploads/1/3/0/7/130738596/divererofafewiz_natibuzugol_miwimofolijijis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5335/8999/files/13464490960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6974/2999/files/kaxojobubub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/pijuviroxokosolov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3242/0264/files/xanizagowubunolim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1531/5349/files/wotifojod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9820/1502/files/91782729758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2661/9288/files/xuvog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7338/6136/files/nutrient_agar_merck.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/6485/3408/files/bookkeeping_template_spreadsheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/affidavit_forms_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5373/4298/files/32481201246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/2798/3510/files/chemical_reaction_engineering_levenspiel.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6323 4944 bytes
SHA-256: 67cc98647f61a91ecaebac11e6bdd694c570d87ea0a6015288195a46ee50c914
font_01_sfnt_off000073eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73EB 9696 bytes
SHA-256: f29a34234cc80d6074890799bbfa72cc7cbc601754c3b955b01ff850b7a24774
font_02_sfnt_off00009504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9504 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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