Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1352ffb52294b6b…

MALICIOUS

PDF

81.1 KB Created: 2021-03-27 20:26:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5557e71befaa1dc92fa66dd8f387e6e4 SHA-1: c9bd196d6be10e46c657894e5a651d85eda0c0e4 SHA-256: a1352ffb52294b6b75b545e50068a5fc9795448945e688fe8f34e3f0ee860352
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://bologen.ru/wix?keyword=the+complete+fsot+study+guide+pdf PDF link annotation
    • http://goldstein.berlin/what_do_numbers_mean_spirituallyi0jge.pdfIn PDF document text
    • http://bluetea.space/warrior_notes_tv_subscribe9wevx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_602035a5e9c4f.pdfIn PDF document text
    • http://bigowet.xyz/xebegekogivokudufodogt538t.pdfIn PDF document text
    • https://nowabarabowuxo.weebly.com/uploads/1/3/4/3/134319250/fe9600d70e0914.pdfIn PDF document text
    • http://mugukix.mygamesonline.org/canon_mx922_print_head_cleaning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417805/normal_60175f4dcb590.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391009/normal_5fe29f0286787.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417537/normal_603659cfae50d.pdfIn PDF document text
    • http://wufamega.scienceontheweb.net/440464402.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415526/normal_6006e3bdc3de7.pdfIn PDF document text
    • https://karoxenerom.weebly.com/uploads/1/3/0/7/130739074/26b18af4522c0c.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://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_6aa56db2d2324774b0aa2c074d7cb39f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/software_as_built_documentation_template.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/zurich_airport_shopping_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/household_budget_template_app.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/82024325965.pdfIn PDF document text
    • http://dirulibas.onlinewebshop.net/action_research_definition.pdfIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_f8642c839b00418fbb473995e773f56b.pdf?index=trueIn PDF document text
    • https://a581e706-3bf6-41fb-8978-ad4d4077590d.filesusr.com/ugd/afbe6b_5bc3cefac53b40ab982f21bea721b880.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A5 5092 bytes
SHA-256: 4bb67ab772894faf7fe8c558cbb170da55bd2c2a4ec5bac3cce1a98709a1740a
font_01_sfnt_off00010212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10212 11092 bytes
SHA-256: bcdf8dcfea133eb282451f49cc7de6ddddb3b009462d7ae53e4a1c4998f5524d
font_02_sfnt_off0001278e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1278E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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