Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1f3cf8a64ea66dd…

MALICIOUS

PDF

56.5 KB Created: 2020-10-26 00:36:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5bf6de41b46d27e276be0dfed5b0cb67 SHA-1: 9560d1e35dcb988d9e2d2e3cabcd71a3d1729250 SHA-256: d1f3cf8a64ea66dd4e0fd49ad8b024d36ff16fb58c4f6cc69d57ad520eaaf7e6
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, suggesting a link farm or spamming operation. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of the file. The embedded URLs are likely used to distribute further malicious content or phish for user credentials.

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.me/123?keyword=commentaries+on+living+pdf+download In PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/059d55fbff3.pdfIn PDF document text
    • https://jizufolikoni.weebly.com/uploads/1/3/4/3/134349493/fikigefoxo.pdfIn PDF document text
    • https://dufevirefat.weebly.com/uploads/1/3/1/4/131438490/jawanal.pdfIn PDF document text
    • https://fezuxikazosulav.weebly.com/uploads/1/3/1/3/131398093/wuzitimoli_makajejubejomuw.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/6dd307677.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/1811083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f8a261562e0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f8b3272b4fde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5f8aedee435a2.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/dazutun/tablature_accord_guitare_facile.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/ethical_dilemma_examples_and_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/situn.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/human_chromosomal_disorders.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/haemophilus_species.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/fujutekaxod.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/pawifegawusavexugarebi.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/17940887473.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/94318721515.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/88842899939.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000848a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x848A 5324 bytes
SHA-256: 04cb42828acb3cfafdb88213f6670f438f1073342d39cfc3f57581075178707e
font_01_sfnt_off00009699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9699 12124 bytes
SHA-256: b443486365f7954ecec5ec56352f9e42e63ec2428107a4d3313708b459edd5ba
font_02_sfnt_off0000be94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE94 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
font_03_sfnt_off0000cc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC48 1736 bytes
SHA-256: 0d9b6ab0354368cdfa5a4e52e4dfb250ede80cec4283e48fafec0a3c1c1d30df

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