Malicious PDF — malware analysis report

Static analysis result for SHA-256 28e2205f83a671e0…

MALICIOUS

PDF

90.4 KB Created: 2021-02-24 00:31:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8fc1f14355f344a899544f32a7fc032d SHA-1: 948772db7fb2e59ace29644a70231496728b410d SHA-256: 28e2205f83a671e07f844f92008bde6d7ac5fb3a1de5973aac6c905108a7b4b6
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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, many hosted on disposable domains, suggesting it functions as a link farm designed to redirect users to potentially malicious content. The embedded document body, though heavily obfuscated, contains keywords related to 'Powermax 105 fault codes', which is likely a lure to attract clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://maypoin.ru/123?utm_term=powermax+105+fault+codes PDF link annotation
    • https://gitapizi.weebly.com/uploads/1/3/2/6/132683136/9817c03.pdfIn PDF document text
    • https://rolafaxamowoti.weebly.com/uploads/1/3/4/9/134903079/tufozavod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503214/normal_6001e0624cc95.pdfIn PDF document text
    • https://nafogoke.weebly.com/uploads/1/3/4/7/134776139/mamujusiruk-wejekomoj.pdfIn PDF document text
    • https://zakosolegim.weebly.com/uploads/1/3/5/3/135337695/gojeg-nojilubanojib-kuxewob.pdfIn PDF document text
    • https://banezinalirunod.weebly.com/uploads/1/3/1/4/131437453/2b0989f.pdfIn PDF document text
    • https://golewobewawir.weebly.com/uploads/1/3/4/3/134350879/girufuxoxe_fesebarubo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386094/normal_600d136f50acd.pdfIn PDF document text
    • http://juriravi.iblogger.org/vidmate_mod_apk_latest_version.pdfIn PDF document text
    • https://jetezilim.weebly.com/uploads/1/3/0/7/130775858/lunegojomeg_kurigepofib_tudegebopeg_kanaf.pdfIn PDF document text
    • https://wadaletabuj.weebly.com/uploads/1/3/2/6/132695896/dudapaderufuf.pdfIn PDF document text
    • https://kabirajozef.weebly.com/uploads/1/3/2/7/132740353/xazedimafag.pdfIn PDF document text
    • https://vopupina.weebly.com/uploads/1/3/1/0/131070761/9136029.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485176/normal_5fde06d7da170.pdfIn PDF document text
    • https://popokafiri.weebly.com/uploads/1/3/1/4/131437291/5447587.pdfIn PDF document text
    • https://nenilinuda.weebly.com/uploads/1/3/1/3/131383514/8051d3ac.pdfIn PDF document text
    • https://tisemadu.weebly.com/uploads/1/3/4/3/134387657/kabepuzoriger.pdfIn PDF document text
    • https://budemarapi.weebly.com/uploads/1/3/1/3/131381681/nanokabaradoxed_rizemuwaruvuw_pufujamigeg_bebatogux.pdfIn PDF document text
    • https://sikowegapewabi.weebly.com/uploads/1/3/5/9/135975971/nebigu.pdfIn PDF document text
    • https://kuserivexujeza.weebly.com/uploads/1/3/4/3/134331384/1306222.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000120e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E2 5644 bytes
SHA-256: 67ade11501044f4942224f55be36cb0dc557b2fd9e36cc4c2d155ce08c3fb5ce
font_01_sfnt_off0001341e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341E 11716 bytes
SHA-256: 3e4f952b0c92f24b016afd7938b1743fe3599dbae1a393a69a818020e43293be

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