Malicious PDF — malware analysis report

Static analysis result for SHA-256 c18eab9674c6083c…

MALICIOUS

PDF

80.7 KB Created: 2021-03-18 23:54:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d1f3f696ecdb5f7adac49dbe6e96b8c3 SHA-1: 5ce52c31cd2c2801dc750a7cdae760344a698a95 SHA-256: c18eab9674c6083c9ec05be548bc5ec7134027010efab629da6f8879500ea960
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as legitimate documents, indicating a link farm or SEO poisoning attempt. The primary URL, 'https://zajinet.ru/wix?keyword=honeywell+th6320r1004+user+manual', suggests a lure to a fake manual page, likely for phishing or malware distribution. ClamAV and ML classifiers also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://zajinet.ru/wix?keyword=honeywell+th6320r1004+user+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501965/normal_600866ea47ced.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467586/normal_5fe9f5e4e2dcb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413564/normal_5fce4bfae5ae1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475559/normal_5ff2bf4e62cb7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457838/normal_5ffe2b322a761.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/satuja/laryngeal_cancer_guidelines_nccn.pdfIn PDF document text
    • http://dodemupisam.epizy.com/72872017807.pdfIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_74bd4fae07964faf84d10a1d074da644.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xupimaral/expressions_math_worksheet_grade_5.pdfIn PDF document text
    • https://b2fc43c4-60ab-4dc1-a1c8-84833fda4e2a.filesusr.com/ugd/37321e_d915e0fce3fc4cca831c1227eecce75f.pdf?index=trueIn PDF document text
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_a0bfdc4a622a46c8907ae6057817874a.pdf?index=trueIn PDF document text
    • https://7fd672c9-0ac8-42d3-9d3c-9ebb2fbea2b4.filesusr.com/ugd/92785a_32696e2a1c354030a16c69ba3218575c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dadupawo/69853777784.pdfIn PDF document text
    • https://cc603790-e41b-456e-9848-d053b607cad6.filesusr.com/ugd/389793_a7a155dc3c0a4180b76ccb1988443316.pdf?index=trueIn PDF document text
    • http://muzubosumewuxem.epizy.com/nursing_competency_test_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/2015_kia_sedona_lx_owners_manual.pdfIn PDF document text
    • http://zutilafuje.epizy.com/sazisemu.pdfIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_6d292b98560a4796a8e320df1d14d957.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF8 5812 bytes
SHA-256: d7b42a9d2cbb874a8f8601618e8a34d2ee36b73d66ac218a26b05e0da855bf81
font_01_sfnt_off00010fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB0 11240 bytes
SHA-256: 83088a6ab1ff646bee19d6c22ffcafcc42e9753372e981fd410f25cc2ec8dcdb

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