Malicious PDF — malware analysis report

Static analysis result for SHA-256 e88327432b706a69…

MALICIOUS

PDF

76.6 KB Created: 2021-03-03 17:28:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 006ff8a713ce0e8c8a70df792c66e543 SHA-1: 11b78b143e0f6e4e193adf31033e4dd5f3a0f914 SHA-256: e88327432b706a6911f7c380b2374ecc0aca2c7158df16d20f6b9cf03bb37461
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links pointing to disposable domains, characteristic of SEO link farms or phishing lures. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/123?utm_term=how+to+do+basic+crochet+stitches+uk PDF link annotation
    • https://cdn.sqhk.co/luwesefizi/ieNiIrN/vidiq_mod_apk_download.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/the_vampire_diaries_season_8_episode_16_full_episode_download.pdfIn PDF document text
    • https://fifekususelamib.weebly.com/uploads/1/3/5/3/135349053/5eab1185c.pdfIn PDF document text
    • https://fajesafopumusid.weebly.com/uploads/1/3/1/8/131871419/vulanukoloxigo-xisidizefaga-sufidosupuj-larek.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/icHZidr/16576604304.pdfIn PDF document text
    • https://riwurarelix.weebly.com/uploads/1/3/4/4/134484082/tigimaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417536/normal_60001faf4b1d9.pdfIn PDF document text
    • https://cdn.sqhk.co/gutinisiv/iiuighd/let_s_draw_with_beejaydel.pdfIn PDF document text
    • https://juxilejaguzu.weebly.com/uploads/1/3/4/4/134404551/kojowutet.pdfIn PDF document text
    • https://viwefinorix.weebly.com/uploads/1/3/0/8/130813514/gotodorakuvebiz_nigibija_tubaku_damefeka.pdfIn PDF document text
    • https://nodopemewave.weebly.com/uploads/1/3/2/6/132682748/fifuburu-vadizuve-muvanakujuz.pdfIn PDF document text
    • https://jowesezowu.weebly.com/uploads/1/3/4/3/134366841/nesodetelejuwujubor.pdfIn PDF document text
    • https://zoviwifave.weebly.com/uploads/1/3/6/0/136053666/difiberatofeduw-ratarusateja-lakon-kosomukunimuxug.pdfIn PDF document text
    • https://sudodufutela.weebly.com/uploads/1/3/5/9/135960501/kumofen.pdfIn PDF document text
    • https://xufizuwerab.weebly.com/uploads/1/3/0/7/130738786/93dc56.pdfIn PDF document text
    • https://wosobariwosamu.weebly.com/uploads/1/3/4/3/134372044/fabinaw-suwobi.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
    • http://womawujun.atwebpages.com/mapazuzapulu.pdfIn PDF document text
    • http://pedirite.onlinewebshop.net/test_de_inteligencias_multiples_para_adultos.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_off0000e222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE222 5028 bytes
SHA-256: 748687d29119bb947a0fbdbff177f307853fad544a3656d2cb1b14cb7a9da448
font_01_sfnt_off0000f360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF360 10320 bytes
SHA-256: 885cf1cb990ed07299b0280bf395428f200b3687ffa657918a0667c756180318
font_02_sfnt_off0001169b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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