Malicious PDF — malware analysis report

Static analysis result for SHA-256 b56e79b512198582…

MALICIOUS

PDF

61.7 KB Created: 2020-11-03 14:54:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 88a55fdfcf76810bf268bf3b30a55560 SHA-1: d7eade39ff4f15366c1d17bf414aa69c87c0e7fb SHA-256: b56e79b512198582a391192aaefc3de5c5301cda573caf80af4fa3da347387c5
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.link/123?keyword=manzil+dua+pdf+in+arabic In PDF document text
    • https://jiketajaw.weebly.com/uploads/1/3/4/4/134464131/9359906.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/zodogijaremi.pdfIn PDF document text
    • https://jabizujosewej.weebly.com/uploads/1/3/4/5/134584717/sevobinul.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://s3.amazonaws.com/kasuwevovog/stcu_spokane_valley_32nd.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/manual_ide_eclipse_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b24186a8-5868-4832-ac40-b6eed54b9869/83045419231.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/tusabudexazibasigenagipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/6901/1621/files/zamoj.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/18327806939.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/vogelzang_wood_stove.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/55323927179.pdfIn PDF document text
    • https://play.google.com/store/apps/details?id=com.andromo.dev27966.app40297MANZILIn 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://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_off000089b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B8 1636 bytes
SHA-256: c1624c868292407e37b6a73d998ab4dc351f9d8fa6993644057eaa5eccacd4ff
font_01_sfnt_off000091f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91F7 4740 bytes
SHA-256: 71911ac5406a50957b4604450e2a81340a68e89660710da26ba36b02eec9cbeb
font_02_sfnt_off0000a209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA209 10536 bytes
SHA-256: 62abff77840e98b3de2d8195d47425cd0d9f4e8696b743ff43bd063b953a679a
font_03_sfnt_off0000c646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC646 16136 bytes
SHA-256: 62b0478e3bcacaeb9df6fa0984507e722920f7489b4d5e25f45df3fdf1e55086
font_04_sfnt_off0000db52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB52 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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